Réponses

Les questions que les parents et les élèves posent vraiment, chacune avec sa réponse dès la première ligne.

La réponse en bref
Des réponses directes aux questions que les familles nous posent sur les examens, les notes, le soutien scolaire et le travail personnel — chaque page prend une question, y répond franchement, puis explique pourquoi, nomme les exceptions et indique la suite.

Mathématiques

What is Cambridge Checkpoint?A set of tests Cambridge marks for its schools at the end of primary and lower secondary. It is diagnostic, not a qualification — no university or employer will ever ask for it.
How many hours should a Grade 8 student study maths?About three hours a week of practice outside class: thirty minutes on four weekdays and an hour at the weekend. Homework is separate and does not count towards it.
How do I know if my child needs a maths tutor?When the mistakes sit in older material rather than in the current topic. A child whose errors are in fractions, negatives and times tables while the class does algebra has a gap teaching can close.
What should I do when my child hates maths?Separate the subject from the feeling. Give three weeks of work they can complete correctly before raising the difficulty at all — tolerance has to be rebuilt before content will go in.
How do I help with maths homework when I cannot do it myself?Protect the time, have them read the question aloud, ask what the first step is rather than what the answer is, and write down where they stopped for the teacher. Do not teach your own method.
How do you build confidence in maths?By changing the work, not the words. Set questions the child gets right about four times in five, and praise the method they used rather than how clever they are.
Does maths anxiety affect exam performance?Yes. Anxiety occupies working memory, and working memory is what carries multi-step calculation, so marks go missing on the longest questions rather than evenly across the paper.
How do you get a child to check their work?Stop saying 'check your work' and name the check instead. Rereading fails because it repeats the reasoning that made the error; substituting the answer back and estimating first do not.
Why does my child say they understand but cannot do the questions?Because understanding while watching is recognition, and doing a question needs recall. Cover the worked example and ask for one similar question with different numbers — that is the whole test.
How do you help a child who rushes through their maths work?Change the structure, not the speed. Cut the set from twenty questions to six, keep the same twenty minutes, and mark the working rather than the answer — finishing early then buys nothing.
Do you need a graphics tablet for online maths tutoring?Not as a student — paper and a camera pointed at it do the job. A tutor writing maths on screen for hours does need one, because a mouse cannot form a fraction bar at speaking speed.
How do tutors show working in an online class?On a shared whiteboard, writing each line at the speed they would write it on a board in front of you. A finished solution pasted on screen teaches far less, because the student never watches the choice being made.
Why is any number to the power of zero equal to one?Because dividing a power by itself gives 1 and, by the index law, also gives that number to the power zero. Eight divided by eight is 1, so 2 to the power 0 is 1.
Why can you not divide by zero?Because division asks what number times the divisor gives you back the original, and nothing times zero gives 12. There is no answer to find, so the operation is undefined rather than merely difficult.
Is zero an even number?Yes. Zero is even because it divides by two with no remainder: 0 = 2 × 0. It also sits between the odd numbers -1 and 1, exactly where an even number belongs.
Why does a negative times a negative make a positive?Because the alternative breaks arithmetic. If -2 × -3 were negative, the distributive law would give two different answers to the same calculation, so -2 × -3 has to equal +6.
Why do you flip the inequality sign when multiplying by a negative?Because multiplying by a negative reflects both numbers through zero, which reverses their order. 3 < 5, but multiplying both by -2 gives -6 and -10, and -6 > -10.
Does 0.999 recurring equal 1?Yes, exactly - not almost. They are two decimal names for one number, and any gap between them would have to be a positive number smaller than every positive number, which does not exist.
Is 1 a prime number?No. A prime number has exactly two distinct factors, 1 and itself. The number 1 has only one factor, so it fails the definition. It is not composite either.
What is the difference between an expression and an equation?An equation contains an equals sign and claims two things are equal, so it can be solved. An expression has no equals sign and cannot be solved - only simplified, expanded, factorised or evaluated.
What is the difference between a factor and a multiple?A factor divides into a number exactly; a multiple is what you get by multiplying that number. 3 is a factor of 12, and 12 is a multiple of 3 - the same relationship read from two ends.
What is the difference between a ratio and a fraction?A ratio compares part with part; a fraction compares part with whole. With 12 boys and 18 girls the ratio of boys to girls is 2:3, but the fraction of the class that is boys is 2/5.
Is the mean the same as the average?Not quite. Average is a general word covering the mean, the median and the mode. The mean is the specific one you get by adding all the values and dividing by how many there are.
Is a square also a rectangle?Yes. A rectangle is a quadrilateral with four right angles, and a square has four right angles, so every square is a rectangle. A rectangle is a square only when all four sides are equal.
What is the difference between significant figures and decimal places?Decimal places are counted from the decimal point; significant figures are counted from the first non-zero digit, wherever it happens to be. So 0.02397 to 2 decimal places is 0.02, but to 2 significant figures it is 0.024.
Why do you do the same thing to both sides of an equation?Because an equals sign claims that the two sides are the same number. Doing something to one side only breaks that claim, so the next line of working is about a different problem.
What is the gambler's fallacy?It is the belief that a run of one outcome makes the opposite outcome more likely next time. For independent events it is false: after ten heads, the probability of tails on the eleventh flip is still 1/2.
What is the difference between theoretical and experimental probability?Theoretical probability is worked out from the situation: one face in six, so 1/6. Experimental probability is counted from what actually happened: 13 sixes in 60 rolls, so 13/60.
What is the difference between BIDMAS and PEMDAS?Only the words. BIDMAS, BODMAS and PEMDAS name the same order of operations — brackets or parentheses, then powers, then multiplication and division together, then addition and subtraction together.
When will I actually use algebra?Most weeks, without calling it algebra — whenever you rearrange a formula, work backwards from a total, or write a spreadsheet cell. The parts you will genuinely never use again are factorising quadratics and surds.
When will I actually use trigonometry?If you go into building, surveying, engineering, electronics, navigation, machining or graphics, weekly. If you go into law, most medicine, primary teaching or general office work, never again after the exam.

GCSE Mathematics

Préparation au SAT

Sciences

Anglais

Histoire

How do you answer a compare question in history?Put both things in the same paragraph. One point of comparison per paragraph, both sides side by side, joined by a word like whereas — never half the answer on one and half on the other.

Géographie

Why do we have seasons?Because the Earth's axis is tilted about 23.4° and keeps pointing the same way all year. That makes sunlight strike a hemisphere at a steeper angle, and for more hours a day, in its summer.

Coran

Tarifs, horaires et inscriptions

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