Scientist. Who's a scientist? Scientist is someone who studied science and applied in solving real life problems.. - Douala - Private lessons

Scientist. Who's a scientist? Scientist is someone who studied science and applied in solving real life problems..

From 33.06 C$ /h

Maths chemistry physics biology and computer science are what makes the difference among science students, and to have a solid science background you must master these key subjects. I'm a chemistry educator currently based in Dlouala yassa. I offer private and holiday home classes for struggling students..

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Bôbô Studio, Yassa, Cameroon

About Me

Dedicated chemistry educator with a B.Sc. in Chemistry and hands-on classroom experience in bilingual secondary schools. Strong record of preparing students for GCE Ordinary and Advanced Level examinations, with particular strength in laboratory management and safety — well suited to a science-focused, internationally oriented school environment. Skilled at designing interactive, student-centred lessons that make abstract chemical concepts accessible, and comfortable working within structured, high-standard academic systems. Fluent in English, with working French, and a genuine interest in contributing to a diverse, multicultural school community.

Education

I'm a graduate student from the University of Buea Cameron with GPA of 3.3/4, graduated with a second class upper division, also I Holder of GCE Advanced and Ordinary level in science

Experience / Qualifications

Secondary School Chemistry Teacher in L'Ébène Bilingual Comprehensive College, Douala-Yassa
• Perseverance Bilingual College, Douala-Yassa Formulated and delivered comprehensive chemistry lesson plans across multiple class forms, following the harmonized MINESEC national teaching syllabus

.Prepared distinct groups of students for the annual GCE examinations, achieving a pass rate through structured revision of past papers and theoretical concepts.Configured, supervised, and evaluated laboratory practicals, strictly maintaining safety protocols regarding hazardous materials.

Age

Children (7-12 years old)

Teenagers (13-17 years old)

Adults (18-64 years old)

Student level

Beginner

Intermediate

Advanced

Duration

60 minutes

The class is taught in

English

Skills

Availability of a typical week

(GMT -04:00)

New York

At teacher's location

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

School support organization (rehearsal courses) at home based in Douala. We provide you with experience for different classes of primary and secondary education. It is made up of teachers, educators and university students dedicated to the cause of the student. Its aim is to provide effective assistance to students' problems. This is why it offers services of:

OUR SERVICES:

Rehearsal classes (academic support) at home for primary school students (SIL, CP, CE1, CE2, CM1, CM2) and secondary school students (6th, 5th, 4th, 3rd, 2nd, 1st, Tle)
SCOLAR orientation
Our professionalism, our pedagogy and the support we offer to our students make the difference with our competitors

Digital suites courses

I - General
A numeric sequence is an application from N to R.
• Bounded sequence
A sequence (Un) is bounded if there exists a real A such that, for all n, Un ≤ A. We say that A is an upper bound of the series.
A sequence (Un) is reduced if there exists a real number B such that, for all n, B ≤ one. One says
that B is a lower bound of the sequence.
A sequence is said to be bounded if it is both increased and reduced, that is to say if it
exists M such that | Un | ≤ M for all n.

• Convergent suite

The sequence (Un) is convergent towards l ∈ R if:
∀ε> 0 ∃n0 ∈ N ∀n ≥ n0 | un − l | ≤ ε.
A sequence which is not convergent is said to be divergent.
When it exists, the limit of a sequence is unique.
The deletion of a finite number of terms does not modify the nature of the sequence, nor its possible limit.
Any convergent sequence is bounded. An unbounded sequence cannot therefore be convergent.

• Infinite limits

We say that the following (un) diverges

Towards + ∞ if: ∀A> 0 ∃n0∈N ∀n ≥ n0 Un≥A
Towards −∞ if: ∀A> 0 ∃n0∈N ∀n≤ n0 Un≤A.

• Known limitations

For k> 1, α> 0, β> 0

II Operations on suites

• Algebraic operations

If (un) and (vn) converge towards l and l ', then the sequences (un + vn), (λun) and (unvn) respectively converge towards l + l', ll and ll '.

If (un) tends to 0 and if (vn) is bounded, then the sequence (unvn) tends to 0.

• Order relation

If (un) and (vn) are convergent sequences such that we have a ≤ vn for n≥n0,
then we have:
Attention, no analogous theorem for strict inequalities.

• Framing theorem

If, from a certain rank, un ≤xn≤ vn and if (un) and (vn) converge towards the
same limit l, then the sequence (xn) is convergent towards l.

III monotonous suites

• Definitions

The sequence (un) is increasing if un + 1≥un for all n;
decreasing if un + 1≤un for all n;
stationary if un + 1 = one for all n.

• Convergence

Any sequence of increasing and increasing reals converges.
Any decreasing and underestimating sequence of reals converges.
If a sequence is increasing and not bounded, it diverges towards + ∞.

• Adjacent suites

The sequences (un) and (vn) are adjacent if:
(a) is increasing; (vn) is decreasing;

If two sequences are adjacent, they converge and have the same limit.

If (un) increasing, (vn) decreasing and un≤vn for all n, then they converge to
l1 and l2. It remains to show that l1 = l2 so that they are adjacent.

IV Extracted suites

• Definition and properties

- The sequence (vn) is said to be extracted from the sequence (un) if there exists a map φ of N
in N, strictly increasing, such that vn = uφ (n).
We also say that (vn) is a subsequence of (un).
- If (un) converges to l, any subsequence also converges to l.

If sequences extracted from (un) all converge to the same limit l, we can conclude that (un) converges to l if all un is a term of one of the extracted sequences studied.
For example, if (u2n) and (u2n + 1) converge to l, then (un) converges to l.

• Bolzano-Weierstrass theorem

From any bounded sequence of reals, we can extract a convergent subsequence.

V Suites de Cauchy

• Definition

A sequence (un) is Cauchy if, for any positive ε, there exists a natural integer n0 for which, whatever the integers p and q greater than or equal to n0, we have | up − uq | <ε.
Be careful, p and q are not related.

• Property

A sequence of real numbers, or of complexes, converges if, and only if, it is
Cauchy

SPECIAL SUITES

I Arithmetic and geometric sequences

• Arithmetic sequences

A sequence (un) is arithmetic of reason r if:

∀ n∈N un + 1 = un + r

General term: un = u0 + nr.

Sum of the first n terms:

• Geometric sequences

A sequence (un) is geometric of reason q ≠ 0 if:

∀ n∈N un + 1 = qun.

General term: un = u0qn

Sum of the first n terms:

II Recurring suites

• Linear recurrent sequences of order 2:

- Such a sequence is determined by a relation of the type:

(1) ∀ n∈N aUn + 2 + bUn + 1 + cUn = 0 with a ≠ 0 and c ≠ 0
and knowledge of the first two terms u0 and u1.
The set of real sequences which satisfy the relation (1) is a vector space
of dimension 2.
We seek a basis by solving the characteristic equation:

ar2 + br + c = 0 (E)
- Complex cases a, b, c
If ∆ ≠ 0, (E) has two distinct roots r1 and r2. Any sequence satisfying (1) is then
like :
where K1 and K2 are constants which we then express as a function of u0 and u1.

If ∆ = 0, (E) has a double root r0 = (- b) / 2a. Any sequence satisfying (1) is then
type:

- Case a, b, c real
If ∆> 0 or ∆ = 0, the form of the solutions is not modified.
If ∆ <0, (E) has two conjugate complex roots r1 = α + iβ and r2 = α − iβ
that we write in trigonometric form r1 = ρeiθ and r2 = ρe-iθ

Any sequence satisfying (1) is then of the type:

• Recurrent sequences un + 1 = f (un)

- To study such a sequence, we first determine an interval I containing all
the following values.
- Possible limit
If (un) converges to l and if f is continuous to l, then f (l) = l.
- Increasing case f
If f is increasing over I, then the sequence (un) is monotonic.
The comparison of u0 and u1 makes it possible to know if it is increasing or decreasing.
- Decreasing case f
If f is decreasing over I, then the sequences (u2n) and (u2n + 1) are monotonic and of
contrary

Made by LEON

Preparation course for the official Probatory Baccalaureate and BEPC exam also intermediate class on all scientific subjects and in computer bonus.
Knowledge in outdoor classes is a plus but otherwise a brief summary of the course will be made before starting the lesson

Stéphane, Engineer in Electrical Engineering and Intelligent Systems and PhD candidate.

Support courses and homework help in Mathematics:
-Geometry
-Statistics and Probabilities
-Algebra (1,2 and 3)
-Study of Functions,
-Differential equations
-Analysis (1 and 2)
-Literal Calculation
-MATLAB

I have had the chance to teach for more than 2 years now.
Patience and Adaptability for a satisfactory result. This is my motto, because to teach you need a lot of patience because to ensure the progress of a student, you need time and a lot of pedagogy. Because you have to understand that the profiles are different and therefore it is always important to adapt well to the student you are supervising for better support.

Mathematics is a science of reasoning and understanding. Understanding this science will allow you to better flourish both in society and at school.
To master this science is to master life, humans and even death

I specialize in tutoring math, computer science and physics for ordinary level students and preparing them to obtain excellent result in GCE Ordinary Level exams. My goal is to keep students challenged, but not overwhelmed. I assign homework after every lesson and provide periodic progress reports. I also apply different methods of teaching.

This Course is intended for all those who have nightmares when approaching a Mathematics, Physics, Chemistry or Science assignment at different levels in English from the Douala Cameroon.
This course is intended for pupils of primary, secondary and 1st university year.
My goal is to advance the student through practice by treating for each student the method that corresponds to him to better understand.
Response guaranteed in a few minutes up to 10 hours maximum.

I'm specialized at teaching maths and chemistry. My aim is to bring out the best in your children both in the primary and secondary schools

I teach all primary school subjects and all science subjects in the ordinary level and ordinary level Economics

Computer networking engineering is a vital field that underpins the modern world. It is the process of designing, building, and maintaining computer networks. Computer networking engineers apply their knowledge of computer science and engineering principles to create networks that are reliable, efficient, and secure.

You will learn how to design computer networks from scratch and how to program protocols, security categories, OSPF, RIP, LAN, VLAN etc.....

pH (potential of hydrogen) is a physical quantity which allows us to measure the acidity or basicity of a solution.
--if the pH<7 the solution is acidic (more H+ ions)
--if the pH=7 the solution is neutral (H+=HO-)
--if pH>7 basic solution (more HO- ion)

The work is carried out as follows:

-Review of concepts covered at school;
-Transmission of additional concepts related to each lesson.
-Phase of exercises with a level of skill acquisition increasing in an increasing manner.
-Regular tests to assess the level of acquisition of concepts.

Over the years, students see Maths as a difficult and boring subject not knowing it's importance in their lives. I'm here to break the myth. To make learning maths interesting and easy to understand with my knowledge and experience. I'm a determined teacher and giving my students the best results is my goal.

Online math lessons for primary and middle school students (ages 7 to 15). Clear, patient teaching adapted to each child, with practical exercises, homework help and personalized follow-up for good, effective results.

School support organization (rehearsal courses) at home based in Douala. We provide you with experience for different classes of primary and secondary education. It is made up of teachers, educators and university students dedicated to the cause of the student. Its aim is to provide effective assistance to students' problems. This is why it offers services of:

OUR SERVICES:

Rehearsal classes (academic support) at home for primary school students (SIL, CP, CE1, CE2, CM1, CM2) and secondary school students (6th, 5th, 4th, 3rd, 2nd, 1st, Tle)
SCOLAR orientation
Our professionalism, our pedagogy and the support we offer to our students make the difference with our competitors

Digital suites courses

I - General
A numeric sequence is an application from N to R.
• Bounded sequence
A sequence (Un) is bounded if there exists a real A such that, for all n, Un ≤ A. We say that A is an upper bound of the series.
A sequence (Un) is reduced if there exists a real number B such that, for all n, B ≤ one. One says
that B is a lower bound of the sequence.
A sequence is said to be bounded if it is both increased and reduced, that is to say if it
exists M such that | Un | ≤ M for all n.

• Convergent suite

The sequence (Un) is convergent towards l ∈ R if:
∀ε> 0 ∃n0 ∈ N ∀n ≥ n0 | un − l | ≤ ε.
A sequence which is not convergent is said to be divergent.
When it exists, the limit of a sequence is unique.
The deletion of a finite number of terms does not modify the nature of the sequence, nor its possible limit.
Any convergent sequence is bounded. An unbounded sequence cannot therefore be convergent.

• Infinite limits

We say that the following (un) diverges

Towards + ∞ if: ∀A> 0 ∃n0∈N ∀n ≥ n0 Un≥A
Towards −∞ if: ∀A> 0 ∃n0∈N ∀n≤ n0 Un≤A.

• Known limitations

For k> 1, α> 0, β> 0

II Operations on suites

• Algebraic operations

If (un) and (vn) converge towards l and l ', then the sequences (un + vn), (λun) and (unvn) respectively converge towards l + l', ll and ll '.

If (un) tends to 0 and if (vn) is bounded, then the sequence (unvn) tends to 0.

• Order relation

If (un) and (vn) are convergent sequences such that we have a ≤ vn for n≥n0,
then we have:
Attention, no analogous theorem for strict inequalities.

• Framing theorem

If, from a certain rank, un ≤xn≤ vn and if (un) and (vn) converge towards the
same limit l, then the sequence (xn) is convergent towards l.

III monotonous suites

• Definitions

The sequence (un) is increasing if un + 1≥un for all n;
decreasing if un + 1≤un for all n;
stationary if un + 1 = one for all n.

• Convergence

Any sequence of increasing and increasing reals converges.
Any decreasing and underestimating sequence of reals converges.
If a sequence is increasing and not bounded, it diverges towards + ∞.

• Adjacent suites

The sequences (un) and (vn) are adjacent if:
(a) is increasing; (vn) is decreasing;

If two sequences are adjacent, they converge and have the same limit.

If (un) increasing, (vn) decreasing and un≤vn for all n, then they converge to
l1 and l2. It remains to show that l1 = l2 so that they are adjacent.

IV Extracted suites

• Definition and properties

- The sequence (vn) is said to be extracted from the sequence (un) if there exists a map φ of N
in N, strictly increasing, such that vn = uφ (n).
We also say that (vn) is a subsequence of (un).
- If (un) converges to l, any subsequence also converges to l.

If sequences extracted from (un) all converge to the same limit l, we can conclude that (un) converges to l if all un is a term of one of the extracted sequences studied.
For example, if (u2n) and (u2n + 1) converge to l, then (un) converges to l.

• Bolzano-Weierstrass theorem

From any bounded sequence of reals, we can extract a convergent subsequence.

V Suites de Cauchy

• Definition

A sequence (un) is Cauchy if, for any positive ε, there exists a natural integer n0 for which, whatever the integers p and q greater than or equal to n0, we have | up − uq | <ε.
Be careful, p and q are not related.

• Property

A sequence of real numbers, or of complexes, converges if, and only if, it is
Cauchy

SPECIAL SUITES

I Arithmetic and geometric sequences

• Arithmetic sequences

A sequence (un) is arithmetic of reason r if:

∀ n∈N un + 1 = un + r

General term: un = u0 + nr.

Sum of the first n terms:

• Geometric sequences

A sequence (un) is geometric of reason q ≠ 0 if:

∀ n∈N un + 1 = qun.

General term: un = u0qn

Sum of the first n terms:

II Recurring suites

• Linear recurrent sequences of order 2:

- Such a sequence is determined by a relation of the type:

(1) ∀ n∈N aUn + 2 + bUn + 1 + cUn = 0 with a ≠ 0 and c ≠ 0
and knowledge of the first two terms u0 and u1.
The set of real sequences which satisfy the relation (1) is a vector space
of dimension 2.
We seek a basis by solving the characteristic equation:

ar2 + br + c = 0 (E)
- Complex cases a, b, c
If ∆ ≠ 0, (E) has two distinct roots r1 and r2. Any sequence satisfying (1) is then
like :
where K1 and K2 are constants which we then express as a function of u0 and u1.

If ∆ = 0, (E) has a double root r0 = (- b) / 2a. Any sequence satisfying (1) is then
type:

- Case a, b, c real
If ∆> 0 or ∆ = 0, the form of the solutions is not modified.
If ∆ <0, (E) has two conjugate complex roots r1 = α + iβ and r2 = α − iβ
that we write in trigonometric form r1 = ρeiθ and r2 = ρe-iθ

Any sequence satisfying (1) is then of the type:

• Recurrent sequences un + 1 = f (un)

- To study such a sequence, we first determine an interval I containing all
the following values.
- Possible limit
If (un) converges to l and if f is continuous to l, then f (l) = l.
- Increasing case f
If f is increasing over I, then the sequence (un) is monotonic.
The comparison of u0 and u1 makes it possible to know if it is increasing or decreasing.
- Decreasing case f
If f is decreasing over I, then the sequences (u2n) and (u2n + 1) are monotonic and of
contrary

Made by LEON

Preparation course for the official Probatory Baccalaureate and BEPC exam also intermediate class on all scientific subjects and in computer bonus.
Knowledge in outdoor classes is a plus but otherwise a brief summary of the course will be made before starting the lesson

Stéphane, Engineer in Electrical Engineering and Intelligent Systems and PhD candidate.

Support courses and homework help in Mathematics:
-Geometry
-Statistics and Probabilities
-Algebra (1,2 and 3)
-Study of Functions,
-Differential equations
-Analysis (1 and 2)
-Literal Calculation
-MATLAB

I have had the chance to teach for more than 2 years now.
Patience and Adaptability for a satisfactory result. This is my motto, because to teach you need a lot of patience because to ensure the progress of a student, you need time and a lot of pedagogy. Because you have to understand that the profiles are different and therefore it is always important to adapt well to the student you are supervising for better support.

Mathematics is a science of reasoning and understanding. Understanding this science will allow you to better flourish both in society and at school.
To master this science is to master life, humans and even death

I specialize in tutoring math, computer science and physics for ordinary level students and preparing them to obtain excellent result in GCE Ordinary Level exams. My goal is to keep students challenged, but not overwhelmed. I assign homework after every lesson and provide periodic progress reports. I also apply different methods of teaching.

This Course is intended for all those who have nightmares when approaching a Mathematics, Physics, Chemistry or Science assignment at different levels in English from the Douala Cameroon.
This course is intended for pupils of primary, secondary and 1st university year.
My goal is to advance the student through practice by treating for each student the method that corresponds to him to better understand.
Response guaranteed in a few minutes up to 10 hours maximum.

I'm specialized at teaching maths and chemistry. My aim is to bring out the best in your children both in the primary and secondary schools

I teach all primary school subjects and all science subjects in the ordinary level and ordinary level Economics

Computer networking engineering is a vital field that underpins the modern world. It is the process of designing, building, and maintaining computer networks. Computer networking engineers apply their knowledge of computer science and engineering principles to create networks that are reliable, efficient, and secure.

You will learn how to design computer networks from scratch and how to program protocols, security categories, OSPF, RIP, LAN, VLAN etc.....

pH (potential of hydrogen) is a physical quantity which allows us to measure the acidity or basicity of a solution.
--if the pH<7 the solution is acidic (more H+ ions)
--if the pH=7 the solution is neutral (H+=HO-)
--if pH>7 basic solution (more HO- ion)

The work is carried out as follows:

-Review of concepts covered at school;
-Transmission of additional concepts related to each lesson.
-Phase of exercises with a level of skill acquisition increasing in an increasing manner.
-Regular tests to assess the level of acquisition of concepts.

Over the years, students see Maths as a difficult and boring subject not knowing it's importance in their lives. I'm here to break the myth. To make learning maths interesting and easy to understand with my knowledge and experience. I'm a determined teacher and giving my students the best results is my goal.

Online math lessons for primary and middle school students (ages 7 to 15). Clear, patient teaching adapted to each child, with practical exercises, homework help and personalized follow-up for good, effective results.

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