Six of them, and why drawing beats re-reading.
This article is still being written by Fatima K.. It will carry the same shape as the others: a short summary, the thing to look for at home, three casual questions to ask, and a small piece of practice to try over a term.
What you can do now
Read the finished articles in Science, or ask us on WhatsApp — a teacher answers, and the question may well shape what this piece covers.
Ask us a question
If something in this topic is on your mind this week, tell us. It is the fastest way to get a straight answer.