Mitosis and Meiosis - Third Preparatory Grade - First Semester - Helwan

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Mitosis and Meiosis - Third Preparatory Grade - First Semester

From 71 C$ /h

First: Mitosis

✳️ Definition:
It is a cell division that occurs in somatic cells (such as skin and muscle cells), and its purpose is growth and replacement of damaged cells.

🔁 Result:
This results in two perfectly identical cells, each with the same number of chromosomes (46 in humans).

📘 Its importance:
Growth
- Tissue regeneration
Wound healing

🧠 Stages of mitosis:
1. Prophase: Chromosomes begin to appear
2. Metaphase: The chromosomes are aligned in the middle of the cell.
3. Anaphase: The chromosomes separate and move to the ends.
4. Final: Two new nuclei are formed

---

🧪 Second: Meiosis

✳️ Definition:
It is a division that occurs in reproductive cells (eggs and sperm), and its purpose is to reduce the number of chromosomes by half in preparation for reproduction.

🔁 Result:
This results in four asymmetrical cells, each containing half the number of chromosomes (23 in humans).

📘 Its importance:
- Production of reproductive cells
Maintaining a constant number of chromosomes in living organisms
- Increase genetic diversity among individuals

🧠 Stages of meiosis:
It consists of two successive divisions:
First division: Reduction in the number of chromosomes
- Second division: Similar to mitosis, to form 4 cells

Extra information

Bring your computer, pen, and notebook.

Location

Online from Egypt

About Me

Dr. Hadeer Habka, Science School, follows the same principle as us 💪🏻♥️ She explains integrated science (physics, chemistry, biology) for all levels (secondary, preparatory, and primary) ✅ Recitation after each lesson ✅ Exams and monitoring of student progress ✅ Continuous review ✅ Comprehensive exams with each unit, and I guarantee you the highest grade in integrated science 😊💯

Education

Bachelor of Science and Education
Helwan University
Very good grade with honors
Master's in Curriculum and Methods of Teaching Science
She has completed numerous Egyptian and international courses and certifications.

Experience / Qualifications

7 years of experience teaching the integrated science curriculum for all grade levels
(Secondary - Preparatory - Primary)
Explaining and simplifying the curriculum, conducting comprehensive reviews, and administering exams on an ongoing basis.

🌟 Are you looking for a fun way to understand science?
I am Dr. Hadeer Habka, a teacher of the integrated science curriculum for all educational levels, with experience in teaching and laboratories, and with a style that makes science an exciting adventure!

🔬 Why did you choose me?
- By explaining science in a story-based and interactive way that makes the student love the subject.
- I make every scientific experiment a fun moment of discovery
I use visual aids and educational games suitable for each age group.
I have experience in simplifying complex concepts for children and teenagers.
- And I like to incorporate Egyptian heritage into the explanation in an innovative way (like the pharaohs and ancient scientific wonders!)

🎯 The stages I work with:
From elementary to high school, with methods that suit each age group.

📚 The lessons could be:
Online or in person
Individuals or small groups
- Includes explanations, applications, and interactive questions

Age

Children (7-12 years old)

Teenagers (13-17 years old)

Adults (18-64 years old)

Seniors (65+ years old)

Student level

Beginner

Intermediate

Advanced

Duration

60 minutes

The class is taught in

English

French

Arabic

Skills

Science

Biology

Availability of a typical week

(GMT -04:00)

New York

Online via webcam

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

How the body's systems work to meet the needs of living organisms - Fourth Grade - First Semester

47 C$ /h

How do the body's systems work together?
- The digestive system: It digests food and converts it into simple nutrients (glucose, amino acids, fatty acids) that reach the blood to nourish the cells.
- The respiratory system: Oxygen enters the body and carbon dioxide exits, ensuring the continuation of cellular respiration within the cells.
- The circulatory system (heart and blood vessels): It transports food and oxygen to all parts of the body, and removes waste products such as carbon dioxide and urea.
- The excretory system (kidneys and skin): gets rid of waste products resulting from vital processes such as urine and sweat, in order to maintain the body's internal balance.
- The nervous system: It regulates the functioning of different organs and sends signals to control movement and respond to external stimuli.
- Muscular and skeletal system: Provides movement and support for the body, and helps protect internal organs.
- The immune system: It defends the body against microbes and foreign substances, thus maintaining health.
Summary
Each system has a specific function, but the integration of these systems is what ensures human survival. Digestion provides food, respiration provides oxygen, blood circulation delivers both to the cells, excretion removes waste, and the nervous system coordinates all of this.

Microbes - First Preparatory Grade - First Semester

71 C$ /h

What are microbes?
Microbes are microscopic organisms that cannot be seen with the naked eye; some are beneficial and some are harmful.
- They are found in the air, water, soil, and on the bodies of living organisms.

🔬 Types of microbes
Viruses: The smallest living organisms, they cause diseases such as influenza and AIDS.
- Bacteria: Some are beneficial (such as yogurt bacteria), and some are harmful (such as typhoid bacteria).
- Fungi: such as yeast used in bread making, including harmful ones like a fungus that causes skin diseases.
- Protozoa: such as amoebas that cause dysentery.

🌍 Where it is found
- In the soil, water, and air.
- Inside the bodies of living organisms and on their surface.

✅ Benefits of microbes
- Production of some medicines, such as penicillin, from fungi.
- Manufacturing foods such as yogurt and cheese using beneficial bacteria.
- Analysis of organic matter and restoration of elements to the soil.

⚠️ The dangers of microbes
- It causes serious diseases such as: typhoid, dysentery, influenza.
Food spoils when it grows on it.

🛡️ Ways to prevent microbes
- Wash your hands thoroughly before and after eating.
- Keep food in the refrigerator.
- Boil or sterilize the water before drinking.
- Getting vaccinated against diseases

Corinne

4.64

(11)

By PROFESSOR & PROFESSIONAL COACH

Hello,

First and foremost, I would like to wish you a warm welcome back to school and a peaceful year ahead as you work towards your goals. I am aware that the economic situation can sometimes be challenging, which is why I offer my services to accompany your child throughout their academic journey with ease and serenity.

Throughout my career as a Graduate Teacher and Graduate Professional Coach, I have worked in various contexts. Until last year, I taught in front of whole classes as well as in private lessons. Since this year, I have been providing face-to-face private lessons at home and also via video conferencing, a mode of teaching that I have practiced with university students for the past ten years.

My teaching environment has undergone significant changes, especially with the emergence of the Covid pandemic. This shift has led our secondary school students to adapt to the new mode of learning and communication, namely video conferencing. Despite the success of this transition, it is important to acknowledge that our younger students still require attention and a psycho-emotional connection in order to develop their autonomy peacefully.

Over the past two decades, I have implemented proven methodological approaches, some of which are borrowed from theater techniques, such as the Davis method (mind mappings/colors), and my specialty, professional coaching, which aims to enhance your child's motivation. My main goal is to foster agility in your child across all subjects, not only for the present but also for their future when I will no longer be by their side.

Ultimately, my objective goes beyond simply focusing on gaining points in a subject. I firmly believe in this approach due to my experience as a Mental Coach working with young athletes between Nice and Cannes, as well as throughout Europe via video conferencing, as part of their preparation for the French Tennis Championships. It has reinforced my conviction that working on a subject should be a nurtured objective that encompasses personal growth and development.

As a Professor in General Education, specializing mainly in scientific subjects, I suggest supporting your child in gaining agility in constructing their academic path during this unique period that is filled with both opportunities and challenges.

Looking forward to meeting you soon,
Corinne.
Teacher and Professional Coach

Courses offered:
- Mathematics / Sciences / Biology
- French / French as a Foreign Language
- History geography

💼 1000 Trained professionals
🎓🏆 1000 Students and High-Level Athletes
in 11 Universities, Sports Clubs, and Schools
🎧 5000 Hours of collective training carried out in person and through E-Learning
🎤 1000 Face-to-Face and E-Learning Conference Hours
👫 6000 Individual Training Hours | Personalized support.

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I am currently a Medical Student and have completed a degree in Biomedical student at Cardiff University. I am warming friendly, willing to help and enthusiastic person. I put all my effort in to something I do. I relish the opportunity to help those who are struggling or who wish to go the extra mile to deepen their knowledge of their chosen subject. f you would like some support for your child im here to help at any age up-to A level
I can provide highly planned, engaging, student-centred lessons that are catered to each individual's needs, and I can be as flexible as you'd like with timings and prefer to go on Skype.

I can provide references. I have previously done work in nurseries and primary schools. I also have taught small children Arabic and religious teachings. I also Have a DBS.

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Mavi

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I am Mavi, a physics engineer working at an aerospace company.
I have been teaching private lessons at the primary, secondary, high school, and university preparatory levels for 11 years. I teach mathematics, physics, chemistry, and science. I have a good command of the curricula of IB, IGCSE, American, Hong Kong, and international schools.

Additionally, I hold the position of president at the Astronomy Society, where I foster my students' interest in astronomy and science beyond the lessons. I prepare the learning environment by incorporating experiments and exploration, moving away from rote education. I often bring experimental materials to class, aiming to make learning memorable through hands-on experiments.

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Are you curious about how nature works?

Let's explore together!

Magdi

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Are you an IB Chemistry HL or SL student aiming for a higher grade and greater confidence in exams?

This course provides **structured, exam-focused IB Chemistry tutoring** designed to strengthen your understanding, improve problem-solving skills, and prepare you effectively for IB assessments.

With **10+ years of experience teaching international Chemistry curricula**, I help students move beyond memorizing content and learn how to apply Chemistry accurately to unfamiliar questions and IB-style problems.

### What We Cover

**IB Chemistry HL & SL**

* Complete syllabus coverage and targeted revision
* Concept clarification and deeper understanding
* Stoichiometry and quantitative calculations
* Organic Chemistry and reaction mechanisms
* Energetics and thermochemistry
* Kinetics
* Equilibrium
* Acids, bases and pH
* Redox reactions and electrochemistry
* Data-based and unfamiliar exam questions
* Past-paper practice and mark-scheme analysis
* Common mistakes and examiner expectations
* Exam timing and answer-structuring strategies

### IB Chemistry IA Support

Students can also receive structured guidance with their **Internal Assessment**, including:

* Developing and refining a suitable research question
* Discussing experimental design and methodology
* Data processing and uncertainty analysis
* Interpreting results
* Evaluation and conclusion
* Improving scientific reasoning and communication

IA support focuses on **guidance and feedback**, helping students understand how to develop and evaluate their own work.

### My Teaching Approach

Lessons are **structured, focused and personalized** according to the student's current level and target grade.

Students learn to:

* Understand Chemistry rather than simply memorize it
* Apply concepts to unfamiliar situations
* Solve calculations accurately and systematically
* Interpret graphs, tables and experimental data
* Structure answers according to IB expectations
* Learn from mark schemes and past-paper questions
* Identify and correct recurring mistakes
* Build confidence under exam conditions

Each student receives a **personalized study plan** based on their strengths, weaknesses, upcoming assessments and target grade.

Whether you are struggling with a particular topic, preparing for exams, or aiming to move from a good grade to an excellent one, the lessons are tailored to your specific needs.

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I travel, if necessary, to your home in the Brussels region as well as in Walloon and Flemish Brabant, with a minimum course duration of 2 hours. With extensive experience, I offer numerous exercises to consolidate knowledge. Distance learning is also possible via platforms such as Skype, Facebook, etc. For students in France, lessons are done exclusively remotely.

Do not hesitate to contact me to organize your lessons according to your needs and availability. I am here to help you strengthen your skills in these subjects in an effective and personalized way. Courses tailored to your needs will allow you to progress quickly.

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Expert Science & Chemistry Tutor – IGCSE | A-Level | IB | KS3
Online & In-Person Lessons Available in Madrid.

Are you looking for a dedicated, experienced, and results-driven science tutor to help you or your child excel in school or exams? Whether you're preparing for IGCSE, A-Level, IB, or Coordinated Sciences, I’m here to help you achieve your goals.

✅ Subjects Offered:

Chemistry (IGCSE, A-Level, IB, Edexcel, AQA, Cambridge)

Coordinated Sciences (Double Award)

General Science (KS3 & KS4)

Exam preparation and lab skills (Paper 3/ practical-based support)

🧪 About Me:
I’m a qualified and passionate science teacher with over 10 years of experience teaching in international schools across Spain, the UK, and the Middle East. I currently work at a leading international school in and specialise in Chemistry and Coordinated Sciences.

🌟 What You’ll Get:

Personalized 1:1 support tailored to your learning style

Exam-focused strategies to boost confidence and grades

Simplified explanations of complex topics

Friendly, patient, and engaging lessons

Help with homework, projects, revision, and lab reports

📍 Location:

Online worldwide via Zoom/Google Meet

In-person in Madrid, flexible hours available

🎯 Who is this for?

Students aiming for top grades in science and chemistry

Those who need extra support understanding key concepts

IB or A-Level students needing help with Internal Assessments or lab work

📩 Message me today to book your first lesson or ask any questions. Let’s boost your science skills and exam success together!

Kelvin

4.64

(11)

These lessons are best for; IB, IGCSE, GCSE, EDEXCEL, CAMBRIDGE CHECKPOINT and CAMBRIDGE O'LEVELS

PHYSICS contents :
•Measuring quantities
•Weight and Mass
•Density, Mass and Volume
•Motion
•Forces
•Light and it's properties properties
•Gas Laws
•Thermal Dynamics
•Momentum
•Machines
•Waves
•Sound
•Electromagnetic Spectrum
•Electricity
•Magnetic induction
•Transformer
•Radiation

Topics to be covered in CHEMISTRY are:
•Atomic structure
•Chemical Bonding
•Electronic configuration
•The Periodic Table and the Trends
•Extraction of Metals
•Thermal Decomposition
•Oxides
•Acids Bases and Salts
•Mole concepts
•Chemical Reactions
•Chemical Energetics
•Redox Reactions
•Non Metals
•Chemistry of the Environment
•Organic Chemistry

Topics to be covered in BIOLOGY are:
•Characteristics and classification of living organisms.
•Magnification of cells
•Types of Cells
•Cells and Solution Concentrations •Reproduction in Plants
of Animals
•Genetic Recombination
•Nutrition in Animals
•Plant Nutrition
•Heredity
•Anomalies in Animals and Plants
•Excretion in Animals
•Endocrine System
•Immune System
•Nervous System
•Adaptation of living organisms on their environment
•Reproduction in Animals
•Animal feeding levels

NOTE📌
Each class session takes 60 minutes duration. Within this time, a student should have COVERED ALL the class OBJECTIVES.
All students are required to ASK QUESTIONS for CLARIFICATIONS as the lesson PROGRESSES.
AIM: To help you pass Exams with ease.

Rania

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The SAT exam is one of the major steps you need to go through in your life; it's a step that is going to determine your college, your university, and your future as a whole. As with a lot of things in life, it can be a hard step, and there is no shame in asking for help. Here comes my role: I will help you overcome your problems and your difficulties. My job here is to help you achieve your desired results and unlock your potential. Simply put, we will go through every lesson, every unit, and every chapter. We will understand the concept of each lesson, with clear examples to follow. After each one, you will be tested, and after finishing your program, you will be tested on it. That's my plan for my students, so if you are interested, you can easily contact me.

Dorcas

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Passionate and dedicated teacher with five years of experience fostering an engaging and inclusive learning environment. I'm committed to promoting student success through personalized instruction, differentiated learning strategies, and active student engagement. Proven track record of implementing innovative teaching methods and achieving measurable improvements in student academic performance.
I offer home tution services for igcse and other curricular.
I tutor learners in both lower and upper grades English, Maths and Science and other subjects if the need be.
Duration per session is an hour and above.

Vincent

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Science includes all natural science subjects; PHYSICS, CHEMISTRY, BIOLOGY and MATHEMATICS . PHYSICS deals with MECHANICS of OBJECTS while CHEMISTRY deals with CHEMICAL CHANGES of different REACTIONS.On the other hand BIOLOGY is the study of LIFE PROCESSES and different MATERIALS that SUPPORTS LIFE.Whereas , MATHEMATICS is a subject that explains DIFFERENT CONCEPTS using NUMBERS and VARIABLES.

Iskander

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I hold a Doctorate in Pharmacy and 2 Masters degrees from the University of Paris V René-Descartes.
Since the beginning of my higher education, and since I established myself as a freelancer after 10 years of managerial career in the pharmaceutical industry, I have been used to regularly giving private lessons to pupils and students of all levels, Primary, Secondary and Higher, supporting them until they pass their exams.
The main disciplines in which I support students are essentially scientific.
The perspectives provided are transdisciplinary.

Fatima

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Learning English can be more fun and meaningful when you use it to talk about subjects you already enjoy!

I am a Licensed Professional Teacher and Science major with experience teaching both online and in the classroom. I have taught English to international learners through ESL classes and currently teach Physics, Chemistry, and Science to Junior and Senior High School students.

In my English classes, students can improve their speaking, pronunciation, vocabulary, grammar, reading, listening, and everyday communication skills through interactive and age-appropriate activities. I use conversations, questions, games, visual materials, and real-life situations to help students become more confident English speakers.

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Emilie

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My name is Emilie and I am a veterinary medicine student. I also hold a Master's degree in health technologies and have almost 10 years of experience in the pharmaceutical industry, including some time in a training-oriented role.

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Dear learners,

In my tutoring sessions, I am committed to helping students and adults alike achieve their learning goals. This means I’ll work with you until you truly understand the material, without charging you extra for the support you need.

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- Cambridge & IELTS preparation: I specialize in helping learners prepare for Cambridge and IELTS exams. From Listening, Speaking, Reading, and Writing, I will share the tips and techniques I used to achieve an IELTS band score of 7.5 in 2024.

- Vietnamese language: I offer Vietnamese language courses, from basic lessons for travelers to specialized, personalized lessons designed to help you speak Vietnamese confidently.

Math & Sciences: I tutor secondary and high school students in Mathematics, Science, Physics, Chemistry, and Biology. My major is International Teacher Education for Secondary Schools, with a specialization in Science Education.

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Hi, I'm Munzir Ashaf, an O/L Chemistry tutor from Sri Lanka.
I am a B.Sc. undergraduate in Chemistry at the University of Sri Jayewardenepura, Sri Lanka, with approximately 4 years of experience teaching O/L Chemistry.

I currently teach London O/L Chemistry and have experience supporting students following Cambridge and Edexcel curricula.

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