facebook
favorite button
member since icon
Since January 2026
Instructor since January 2026
Translated by GoogleSee original
Teaching geology to third-year secondary school students in Arabic and English, and we can work with any specialized geology curriculum in the world.
course price icon
From 18.48 C$ /h
arrow icon
Teaching geology in Arabic and English to students in Egypt and the Arab world, and working with any geology and geomorphology curriculum in the world and the Arab world, once the required material is obtained. The goal of geology is to study the Earth's surface.
Location
location type icon
Online from Egypt
Age
Children (7-12 years old)
Teenagers (13-17 years old)
Adults (18-64 years old)
Student level
Beginner
Intermediate
Advanced
Duration
45 minutes
60 minutes
The class is taught in
Arabic
English
Availability of a typical week
(GMT -04:00)
New York
at teacher icon
Online via webcam
Mon
Tue
Wed
Thu
Fri
Sat
Sun
00-04
04-08
08-12
12-16
16-20
20-24
Similar classes
arrow icon previousarrow icon next
verified badge
My name is Fawzi, and I am a French language teacher. Since 2012, I have been giving private lessons online. My objective is to support learners towards success in the DELF (Diploma of Studies in French Language) or the DALF (Advanced Diploma in French Language), as well as the TCF (French Knowledge Test). I have had the pleasure of helping many students of different nationalities through my online courses. For me, helping enthusiasts practice the French language is an enriching experience, because I understand the importance of success in the lives of ambitious people.

I speak Arabic, French, Spanish, a little English and a little Turkish. During my classes, I explain concepts in French, Arabic or Spanish, depending on your preference. At the end of each session, I offer exercises to do as homework, in order to identify your gaps and monitor your progress.

Here are some essential points to know about the DELF and DALF:
- The DELF (Diploma in French Language Studies) and the DALF (Advanced Diploma in French Language) are two high-quality official diplomas. They are aligned with the levels of the Common European Framework of Reference for Languages and cover the following six levels, from the most basic to the most advanced: A1, A2, B1, B2, C1, C2. These diplomas are suitable for all ages and all audiences.
- The DELF B2 and, increasingly, the DALF C1, provide access to French, European or French-speaking universities, as well as certain Grandes Ecoles.

If you plan to take DELF or DALF exams, or if you want to improve your level, do not hesitate to book your sessions with me to start preparation. I am available !
verified badge
Hi! Welcome! I am a Ph.D. researcher in Physics at the University of Cologne, Germany. Recently, I graduated from the University of Groningen in the Netherlands with a Master's degree in Nanoscience (w/ cum Laude). I offer private tutoring (for high school and/or university-level students) so you can understand the fundamental concepts and excel in your studies. I have teaching experience of 5+ years in Physics and Mathematics to both high school and university-level students.

This class aims to provide an overview of calculus and linear algebra and focuses on the fundamental mathematical tools and concepts, such as limits, differentiation, and integration. Building on these basic concepts, we will review methods for solving problems related to optimization, linear differential equations, and matrix algebra.

Outline of the course:
1. Calculus:
1.1 Limits of functions
1.2 Continuity, types of discontinuities, intermediate value theorem
1.3 Differentiation (or derivative), slope, secant, tangent
1.4 Rules and theorems for differentiation, power rule, product rule, chain rule
1.5 Derivatives of exp, log, and trigonometric functions
1.6 Implicit differentiation and derivative of inverse functions
1.7 Rolle's theorem, mean value theorem, critical point, maximum/minimum of a function
1.8 First and second derivative tests, inflection points
1.9 Anti-derivative, indefinite integral, integration by substitution, integration by parts
1.10 Definite integral and its application (area between curves, application in physics)\
1.11 Optimization and linear differential equations

2. Linear Algebra:
2.1 Vectors and scalars in Euclidean space, vector arithmetic, scalar product, cross product
2.2 Equations for lines and planes, vector spaces, linear independence, span, basis, dimension
2.3 Linear transformations, coordinates, and representation of linear transformations by matrices
2.4 Matrix operations: matrix multiplication, transpose, determinant, inverse, and Hermitian conjugate
2.5 Systems of linear equations, Gaussian elimination
2.6 Eigenvalues and eigenvectors
2.7 Range, kernel, and rank-nullity theorem

and many more...

*Note that the sessions will be held online (via Discord/Zoom/Microsoft Teams).
verified badge
If you're looking for a French language learning experience that's both rewarding and fun, you've come to the right place!
My French lessons are designed to help you acquire solid language skills, while immersing you in the French culture and way of life. We will work on the four main skills - oral and written comprehension, as well as oral and written expression - so that you can become a confident and competent French speaker.
Whether you are a beginner or you already have knowledge of French, my lessons are adapted to your needs and your level. I am passionate about teaching this beautiful language and look forward to helping you achieve your linguistic and cultural goals.
So, ready to start this linguistic and cultural adventure with me?
Register now and together we will explore the fascinating world of the French language!
verified badge
Welcome to my Maths, Physics and Science tutoring class, crafted especially for young minds preparing for IB MYP, IGCSE, and GCSE exams. As a passionate learner and dedicated tutor, I am committed to helping students not only comprehend but also develop a love for these captivating subjects. Here's what you can anticipate from my tutoring sessions

Personalised Learning: Every learner is unique, and I believe in tailoring my teaching methods to suit each student's individual needs. I don't judge; instead, I concentrate on understanding their strengths and areas for improvement to create a supportive and encouraging learning environment.

Concept Breakdown: I dissect complex topics into simpler, more manageable parts, making it easier for students to grasp challenging concepts and build a strong foundation in Physics and Science.

Student-Centred Approach: I enjoy teaching students and continually strive to ignite their curiosity and passion for learning. I aim to make each lesson engaging and enjoyable, helping students recognise the real-world applications of what they learn.

Shared Strategies: As a student who has successfully qualified for the Engineering Entrance exam test and is currently studying abroad on a fully funded scholarship, I bring my own learning strategies and study techniques to the table. These proven methods will help students achieve their academic goals.

Continuous Improvement: I am always learning and growing, just like my students. This continuous improvement mindset, which I actively promote, inspires and motivates students to strive for their best. It enables me to stay updated with the latest educational trends and techniques, ensuring that my students receive the best possible guidance.

Supportive Environment: I encourage students to ask questions, no matter how trivial they might seem. By creating a friendly and comfortable atmosphere, I ensure that students feel comfortable and open to express their doubts and curiosities, leading to a deeper understanding of the subjects.
verified badge
Franco-British associate professor, author at CNED, 33 years of experience from middle school to scientific preparatory classes, supports you in the success of your project in English.

Refresher training, consolidation and in-depth study, training for exams, certifications and competitions or personal projects.

Here is a non-exhaustive sample of the services that I offer:
- skills assessments,
- training for the baccalaureate exam, BTS exams
- practice exams and oral exams for CPGE (Mines Ponts - Mines Télécom - CCINP - etc.),
- training for certifications (Cambridge, TOEFL, TOEIC, IELTS, etc.),
- review and re-explanation of lessons,
- themed conversation, coaching on professional situations...

Prior to the service, we will be able to...
- define needs and potential problems
- carry out a skills assessment based on the CEFR
- co-develop a remediation or progress procedure,
- take into account the learner's courses/documents/learning materials,
- check understanding of the frameworks and expectations of programs, exams, or competitions, etc.

The session is intended to be a linguistic and cultural immersion in English, based on a communication approach.

The approach is multimodal, based on authentic and current resources and uses all language activities to progress (oral and written expression, oral and written comprehension and mediation).

During the sessions, if necessary, learning resources will be provided to expand the vocabulary, recall certain language fundamentals or remind people of a point of methodology.

For certain services (such as oral exams), working documents may be provided in advance.
verified badge
This class is for students who aim to excel in English and literature for exams or university preparation.
This class will focus on:
Advanced text analysis and interpretation
Essay writing, literary critique, and argumentation
Vocabulary expansion and precise expression
Exam preparation, including discussion, speaking, and presentation skills
Lessons will be tailored to each student’s objectives, needs and current level. Using engaging texts, guided writing exercises, and interactive discussions, students strengthen analytical thinking, refine their communication, and gain confidence in both writing and speaking. Lessons will be taught according to the school curricula as well.

Classes are available in person at the student’s home or at my place, and online.
verified badge
Teaching chemistry and mathematics at the secondary level aims to build a solid scientific foundation and develop analytical thinking by connecting shared concepts. Chemistry content includes topics such as atomic structure, reactions, and organic chemistry, while mathematics covers algebra, functions, and calculus. Integration is demonstrated by using algebraic equations to balance reactions, logarithms to calculate pH, and differential calculus to study reaction rates. Effective teaching methods rely on discovery learning, computer simulations, and practical projects that integrate the two subjects. Challenges such as the difficulty of abstraction, individual differences, and time constraints necessitate comprehensive planning by the teacher, varied assessment methods, the stimulation of scientific curiosity, and continuous professional development.
verified badge
Do you want to improve your math skills? Whether for school, exam preparation, or simply as a leisure activity.

I've been teaching math for about 15 years. Over the years, I've met a wide variety of people, including students of all ages and from all over the DACH region (Germany, Austria, Switzerland), as well as students from German schools abroad. My youngest student was 4 years old and my oldest was 56!

During the final stages of my studies, I increasingly focused on teaching until I started working full-time as a tutor about four years ago. Now I tutor students of all ages in Math, Biology, German, and English.

I want my students to enjoy learning. Accordingly, my teaching style is very relaxed. No two lessons are the same, as each one is tailored to the individual student. What I've learned over the years is that every student thinks and learns differently.

I haven't obtained a formal certification in dyscalculia, but I have occasionally tutored children with mild dyscalculia. Depending on the severity of the dyscalculia, I would prefer to refer you to a specialist.
verified badge
I specialize in teaching primary Mathematics (Classes 1–5) with a focus on strong basics, mental maths, and problem-solving skills. My teaching includes fun activities, visual methods, and real-life examples to make learning engaging and effective.
verified badge
I am Professor Ayman 👨‍🏫
An English teacher with exceptional experience in simplifying lessons, explaining grammar rules, and solving exercises in a clear and easy style ✨

I help my students understand the material deeply and empower them to excel with confidence 💪
Through a simplified teaching method and a strong focus on foundational skills, I guarantee the student a solid base that will distinguish them in the English language 🎯
verified badge
I am a dedicated tutor offering comprehensive lessons for students from Grade 1 to 10. For younger students (1-8), I focus on building strong foundations in Science, Math, and English. For 9th and 10th graders, I specialize in Chemistry and Biology, ensuring complex concepts are easy to understand. My goal is to help students improve their grades and build confidence through interactive and personalized teaching.
verified badge
Are you preparing for your IGCSE Physics exams and finding some topics difficult to understand?
I am an experienced Physics teacher who specializes in helping students simplify complex concepts and achieve excellent results in their exams.

In this class, I will guide you through key IGCSE topics such as electricity, forces, energy, waves, and more using clear explanations and practical examples.
My teaching approach focuses on:
Breaking down difficult concepts into simple steps
Solving past questions and exam-style problems
Building confidence and understanding

This class is suitable for students in Grade 7–11 preparing for IGCSE or similar exams.
Whether you need help catching up, revising, or mastering difficult topics, I am here to support you.
First lesson is available to understand your level and learning needs.
verified badge
Mathematics teacher, holder of a teaching qualification.

I offer private mathematics lessons for all levels: middle school, high school and higher education (including preparation for university exams and demanding programs).

I support students in:

a thorough understanding of the concepts
exam preparation (baccalaureate, university, competitive exams)
the development of reasoning and method

I adapt to each profile: regular support, refresher courses or in-depth study.

Mathematics teacher, holder of a teaching qualification.

I offer private mathematics lessons for all levels, from secondary to higher education, including preparation for exams and demanding courses.

I support students in:

a thorough understanding of the concepts
Exam preparation (secondary, university, competitive exams)
the development of reasoning and method

I adapt to each profile: regular support, refresher courses or in-depth study.

A clear, structured and progressive method, with rigorous explanations and concrete examples.

Online course.
verified badge
I am an International Baccalaureate Economics teacher and a teacher of Economics in the national curriculum. I have over five years of experience teaching in secondary schools. I prepare students for their IB and EBAU exams, with a strong emphasis on continuous practice and real-life examples.
verified badge
Chemistry is the study of matter and how it changes, starting from the simplest idea that everything around us—air, water, metals, and even living things—is made of tiny particles called atoms. In middle school, students learn the basics like solids, liquids, and gases, how substances mix or change, and the idea that atoms form elements and compounds. In high school, chemistry becomes more detailed and powerful, covering atomic structure, the periodic table, chemical bonding, reactions, and calculations like the mole concept that allow you to predict how much of a substance is involved in a reaction. Students also learn about acids and bases, gases, energy changes, and how chemistry applies to real life in things like batteries, medicines, cooking, and materials. Overall, chemistry is about understanding the hidden rules that explain how everything in the physical world is built and how it transforms.
message icon
Contact محمد
repeat students icon
1st lesson is backed
by our
Good-fit Instructor Guarantee
Similar classes
arrow icon previousarrow icon next
verified badge
My name is Fawzi, and I am a French language teacher. Since 2012, I have been giving private lessons online. My objective is to support learners towards success in the DELF (Diploma of Studies in French Language) or the DALF (Advanced Diploma in French Language), as well as the TCF (French Knowledge Test). I have had the pleasure of helping many students of different nationalities through my online courses. For me, helping enthusiasts practice the French language is an enriching experience, because I understand the importance of success in the lives of ambitious people.

I speak Arabic, French, Spanish, a little English and a little Turkish. During my classes, I explain concepts in French, Arabic or Spanish, depending on your preference. At the end of each session, I offer exercises to do as homework, in order to identify your gaps and monitor your progress.

Here are some essential points to know about the DELF and DALF:
- The DELF (Diploma in French Language Studies) and the DALF (Advanced Diploma in French Language) are two high-quality official diplomas. They are aligned with the levels of the Common European Framework of Reference for Languages and cover the following six levels, from the most basic to the most advanced: A1, A2, B1, B2, C1, C2. These diplomas are suitable for all ages and all audiences.
- The DELF B2 and, increasingly, the DALF C1, provide access to French, European or French-speaking universities, as well as certain Grandes Ecoles.

If you plan to take DELF or DALF exams, or if you want to improve your level, do not hesitate to book your sessions with me to start preparation. I am available !
verified badge
Hi! Welcome! I am a Ph.D. researcher in Physics at the University of Cologne, Germany. Recently, I graduated from the University of Groningen in the Netherlands with a Master's degree in Nanoscience (w/ cum Laude). I offer private tutoring (for high school and/or university-level students) so you can understand the fundamental concepts and excel in your studies. I have teaching experience of 5+ years in Physics and Mathematics to both high school and university-level students.

This class aims to provide an overview of calculus and linear algebra and focuses on the fundamental mathematical tools and concepts, such as limits, differentiation, and integration. Building on these basic concepts, we will review methods for solving problems related to optimization, linear differential equations, and matrix algebra.

Outline of the course:
1. Calculus:
1.1 Limits of functions
1.2 Continuity, types of discontinuities, intermediate value theorem
1.3 Differentiation (or derivative), slope, secant, tangent
1.4 Rules and theorems for differentiation, power rule, product rule, chain rule
1.5 Derivatives of exp, log, and trigonometric functions
1.6 Implicit differentiation and derivative of inverse functions
1.7 Rolle's theorem, mean value theorem, critical point, maximum/minimum of a function
1.8 First and second derivative tests, inflection points
1.9 Anti-derivative, indefinite integral, integration by substitution, integration by parts
1.10 Definite integral and its application (area between curves, application in physics)\
1.11 Optimization and linear differential equations

2. Linear Algebra:
2.1 Vectors and scalars in Euclidean space, vector arithmetic, scalar product, cross product
2.2 Equations for lines and planes, vector spaces, linear independence, span, basis, dimension
2.3 Linear transformations, coordinates, and representation of linear transformations by matrices
2.4 Matrix operations: matrix multiplication, transpose, determinant, inverse, and Hermitian conjugate
2.5 Systems of linear equations, Gaussian elimination
2.6 Eigenvalues and eigenvectors
2.7 Range, kernel, and rank-nullity theorem

and many more...

*Note that the sessions will be held online (via Discord/Zoom/Microsoft Teams).
verified badge
If you're looking for a French language learning experience that's both rewarding and fun, you've come to the right place!
My French lessons are designed to help you acquire solid language skills, while immersing you in the French culture and way of life. We will work on the four main skills - oral and written comprehension, as well as oral and written expression - so that you can become a confident and competent French speaker.
Whether you are a beginner or you already have knowledge of French, my lessons are adapted to your needs and your level. I am passionate about teaching this beautiful language and look forward to helping you achieve your linguistic and cultural goals.
So, ready to start this linguistic and cultural adventure with me?
Register now and together we will explore the fascinating world of the French language!
verified badge
Welcome to my Maths, Physics and Science tutoring class, crafted especially for young minds preparing for IB MYP, IGCSE, and GCSE exams. As a passionate learner and dedicated tutor, I am committed to helping students not only comprehend but also develop a love for these captivating subjects. Here's what you can anticipate from my tutoring sessions

Personalised Learning: Every learner is unique, and I believe in tailoring my teaching methods to suit each student's individual needs. I don't judge; instead, I concentrate on understanding their strengths and areas for improvement to create a supportive and encouraging learning environment.

Concept Breakdown: I dissect complex topics into simpler, more manageable parts, making it easier for students to grasp challenging concepts and build a strong foundation in Physics and Science.

Student-Centred Approach: I enjoy teaching students and continually strive to ignite their curiosity and passion for learning. I aim to make each lesson engaging and enjoyable, helping students recognise the real-world applications of what they learn.

Shared Strategies: As a student who has successfully qualified for the Engineering Entrance exam test and is currently studying abroad on a fully funded scholarship, I bring my own learning strategies and study techniques to the table. These proven methods will help students achieve their academic goals.

Continuous Improvement: I am always learning and growing, just like my students. This continuous improvement mindset, which I actively promote, inspires and motivates students to strive for their best. It enables me to stay updated with the latest educational trends and techniques, ensuring that my students receive the best possible guidance.

Supportive Environment: I encourage students to ask questions, no matter how trivial they might seem. By creating a friendly and comfortable atmosphere, I ensure that students feel comfortable and open to express their doubts and curiosities, leading to a deeper understanding of the subjects.
verified badge
Franco-British associate professor, author at CNED, 33 years of experience from middle school to scientific preparatory classes, supports you in the success of your project in English.

Refresher training, consolidation and in-depth study, training for exams, certifications and competitions or personal projects.

Here is a non-exhaustive sample of the services that I offer:
- skills assessments,
- training for the baccalaureate exam, BTS exams
- practice exams and oral exams for CPGE (Mines Ponts - Mines Télécom - CCINP - etc.),
- training for certifications (Cambridge, TOEFL, TOEIC, IELTS, etc.),
- review and re-explanation of lessons,
- themed conversation, coaching on professional situations...

Prior to the service, we will be able to...
- define needs and potential problems
- carry out a skills assessment based on the CEFR
- co-develop a remediation or progress procedure,
- take into account the learner's courses/documents/learning materials,
- check understanding of the frameworks and expectations of programs, exams, or competitions, etc.

The session is intended to be a linguistic and cultural immersion in English, based on a communication approach.

The approach is multimodal, based on authentic and current resources and uses all language activities to progress (oral and written expression, oral and written comprehension and mediation).

During the sessions, if necessary, learning resources will be provided to expand the vocabulary, recall certain language fundamentals or remind people of a point of methodology.

For certain services (such as oral exams), working documents may be provided in advance.
verified badge
This class is for students who aim to excel in English and literature for exams or university preparation.
This class will focus on:
Advanced text analysis and interpretation
Essay writing, literary critique, and argumentation
Vocabulary expansion and precise expression
Exam preparation, including discussion, speaking, and presentation skills
Lessons will be tailored to each student’s objectives, needs and current level. Using engaging texts, guided writing exercises, and interactive discussions, students strengthen analytical thinking, refine their communication, and gain confidence in both writing and speaking. Lessons will be taught according to the school curricula as well.

Classes are available in person at the student’s home or at my place, and online.
verified badge
Teaching chemistry and mathematics at the secondary level aims to build a solid scientific foundation and develop analytical thinking by connecting shared concepts. Chemistry content includes topics such as atomic structure, reactions, and organic chemistry, while mathematics covers algebra, functions, and calculus. Integration is demonstrated by using algebraic equations to balance reactions, logarithms to calculate pH, and differential calculus to study reaction rates. Effective teaching methods rely on discovery learning, computer simulations, and practical projects that integrate the two subjects. Challenges such as the difficulty of abstraction, individual differences, and time constraints necessitate comprehensive planning by the teacher, varied assessment methods, the stimulation of scientific curiosity, and continuous professional development.
verified badge
Do you want to improve your math skills? Whether for school, exam preparation, or simply as a leisure activity.

I've been teaching math for about 15 years. Over the years, I've met a wide variety of people, including students of all ages and from all over the DACH region (Germany, Austria, Switzerland), as well as students from German schools abroad. My youngest student was 4 years old and my oldest was 56!

During the final stages of my studies, I increasingly focused on teaching until I started working full-time as a tutor about four years ago. Now I tutor students of all ages in Math, Biology, German, and English.

I want my students to enjoy learning. Accordingly, my teaching style is very relaxed. No two lessons are the same, as each one is tailored to the individual student. What I've learned over the years is that every student thinks and learns differently.

I haven't obtained a formal certification in dyscalculia, but I have occasionally tutored children with mild dyscalculia. Depending on the severity of the dyscalculia, I would prefer to refer you to a specialist.
verified badge
I specialize in teaching primary Mathematics (Classes 1–5) with a focus on strong basics, mental maths, and problem-solving skills. My teaching includes fun activities, visual methods, and real-life examples to make learning engaging and effective.
verified badge
I am Professor Ayman 👨‍🏫
An English teacher with exceptional experience in simplifying lessons, explaining grammar rules, and solving exercises in a clear and easy style ✨

I help my students understand the material deeply and empower them to excel with confidence 💪
Through a simplified teaching method and a strong focus on foundational skills, I guarantee the student a solid base that will distinguish them in the English language 🎯
verified badge
I am a dedicated tutor offering comprehensive lessons for students from Grade 1 to 10. For younger students (1-8), I focus on building strong foundations in Science, Math, and English. For 9th and 10th graders, I specialize in Chemistry and Biology, ensuring complex concepts are easy to understand. My goal is to help students improve their grades and build confidence through interactive and personalized teaching.
verified badge
Are you preparing for your IGCSE Physics exams and finding some topics difficult to understand?
I am an experienced Physics teacher who specializes in helping students simplify complex concepts and achieve excellent results in their exams.

In this class, I will guide you through key IGCSE topics such as electricity, forces, energy, waves, and more using clear explanations and practical examples.
My teaching approach focuses on:
Breaking down difficult concepts into simple steps
Solving past questions and exam-style problems
Building confidence and understanding

This class is suitable for students in Grade 7–11 preparing for IGCSE or similar exams.
Whether you need help catching up, revising, or mastering difficult topics, I am here to support you.
First lesson is available to understand your level and learning needs.
verified badge
Mathematics teacher, holder of a teaching qualification.

I offer private mathematics lessons for all levels: middle school, high school and higher education (including preparation for university exams and demanding programs).

I support students in:

a thorough understanding of the concepts
exam preparation (baccalaureate, university, competitive exams)
the development of reasoning and method

I adapt to each profile: regular support, refresher courses or in-depth study.

Mathematics teacher, holder of a teaching qualification.

I offer private mathematics lessons for all levels, from secondary to higher education, including preparation for exams and demanding courses.

I support students in:

a thorough understanding of the concepts
Exam preparation (secondary, university, competitive exams)
the development of reasoning and method

I adapt to each profile: regular support, refresher courses or in-depth study.

A clear, structured and progressive method, with rigorous explanations and concrete examples.

Online course.
verified badge
I am an International Baccalaureate Economics teacher and a teacher of Economics in the national curriculum. I have over five years of experience teaching in secondary schools. I prepare students for their IB and EBAU exams, with a strong emphasis on continuous practice and real-life examples.
verified badge
Chemistry is the study of matter and how it changes, starting from the simplest idea that everything around us—air, water, metals, and even living things—is made of tiny particles called atoms. In middle school, students learn the basics like solids, liquids, and gases, how substances mix or change, and the idea that atoms form elements and compounds. In high school, chemistry becomes more detailed and powerful, covering atomic structure, the periodic table, chemical bonding, reactions, and calculations like the mole concept that allow you to predict how much of a substance is involved in a reaction. Students also learn about acids and bases, gases, energy changes, and how chemistry applies to real life in things like batteries, medicines, cooking, and materials. Overall, chemistry is about understanding the hidden rules that explain how everything in the physical world is built and how it transforms.
Good-fit Instructor Guarantee
favorite button
message icon
Contact محمد