Assessment Books: How to Choose One, and How Many Is Too Many

31 August 2026 · by Larry

You are standing in front of a shelf that is two metres wide and four shelves high, all of it for one level of one subject. Every cover promises mastery. Several have the word "challenging" on them. You have about ten minutes before you need to be somewhere else.

Most assessment books are bought exactly like this — in a hurry, on a cover and a title — and a good number of them are never finished. That is not a failure of discipline. It is what happens when a book is chosen before anyone has decided what it is for.

The question that comes before "which one"

An assessment book can do three quite different jobs, and the book that does one well is usually poor at the others.

• Practise something you already know is weak. Your child understands the method but is slow or careless with it, and needs repetition on that one thing. What you want here is a narrow book, or one chapter of a broad one.
• Find out what is weak. You genuinely do not know where the gaps are. What you want is coverage — a book that touches every topic at the level, lightly.
• Build stamina for a paper. Sitting a full-length paper, with the mix of question types and the pressure of length. This is a different skill from doing maths, and it is the one that gets confused with the others most often.

Pick the job first. It takes fifteen seconds and it eliminates most of the shelf.

The two-minute check, in the shop

Four things, in this order. None of them is the cover.

1. Turn to the answers first. This is the single most useful thing you can do, and almost nobody does it. If the answer section is a column of bare numbers, the book can only tell your child that they were wrong. If it shows the working — the steps, and ideally why a common wrong answer is wrong — the book can teach when you are not sitting beside it. A book with worked solutions is worth more than two books without, and it is the difference between a child who can check themselves and a child who needs you for every question.

2. Look at whether the questions climb. Open a chapter in the middle. Are the first few questions gentle and the last few genuinely harder, or is every question the same difficulty repeated twenty times? A chapter that ramps lets a child start and get somewhere. A flat chapter is either too easy all the way through or a wall from question one.

3. Test the level with a page your child can already do. Find a topic they are comfortable with and read the questions as if you were them. If the questions on a familiar topic already look hard, the book is pitched above where they are — which is fine as a stretch and disastrous as their only book. Level labels on covers are not consistent between publishers.

4. Look at the page, not the page count. Cramped print, no space to work in, tiny diagrams. A child who has to do their working on a separate piece of paper will do less working, and working is where the marks are.

How many is too many

There is a simple test, and it is not about a number.

Too many is the point at which no book is being finished. If there are four books in the house and each has the first two chapters done, the problem is not that you need a fifth. Every abandoned book quietly teaches the same lesson — that starting is normal and finishing is optional — and that lesson is more expensive than any of the books.

One book, worked through with the answers actually checked, does more than five bought with good intentions. If you want a second, let it be for a different job from the list above, not a second opinion on the same one.

And there is a limit that has nothing to do with books: a child has a certain amount of attention in an evening, and it is smaller than most timetables assume. Adding pages does not add hours. It mostly reduces the care taken on the pages that were already there, which shows up as the mistakes that look careless but are not.

What to do with the ones you have already bought

Do not throw them out and do not feel bad about them. Do this instead.

Take the books off the shelf and put all but one away, out of sight. Choose the remaining one by the job you actually need right now. Then, rather than starting at page one again, use the contents page: pick the two or three topics that are genuinely causing trouble and do only those chapters. A book does not have to be completed in order, or at all, to have been worth buying. Finishing three chapters that matter beats grinding through fourteen that do not.

If you cannot tell which topics are causing trouble, that is the "find out what is weak" job, and it deserves its own short session rather than a purchase.

The thing a book cannot do

An assessment book cannot notice. It cannot see that your child got the answer right but took ninety seconds on something that should be automatic, or that the same small error appears in every third question, or that they have quietly stopped trying the last question on every page.

That noticing is the part that changes outcomes, and it is done by a person, usually in about five minutes of sitting beside them and watching rather than marking. The book is the material. It was never the teaching.

So if you buy one this week, buy one with the working shown in the back, use the contents page rather than page one, and spend the ten minutes you saved sitting next to them instead.