School prepares for college. Most of a life is not spent in college.

The New Nuskas: seven books, Class 6 to Class 12, on the ideas no school subject teaches.

If you are the child this book is for, you can turn the page. The next page is yours. This one is for whoever else wants to know why the book was made.

The list of subjects a school teaches was settled more than a hundred years ago. In 1892 a committee of ten American educators met to decide what a school should teach, and the schools of British India were built on a similar plan around the same time. The list was made to answer one question: what will the university examine? What sits inside each subject has been revised many times since. The list itself has never been reopened.

So school, as it stands, prepares for college. But most of a life is not spent in college, and the ideas that decide how a life goes are mostly not on any paper a student will sit. Whether school does its one job well is argued about. That it does no other job is not.

There are two ways to make school more useful. One is to add what jobs need: accounts, a spreadsheet, a letter that gets answered. The larger change is to add what living needs. How to tell luck from skill in a result. How to know whose side an adviser is on. What a cost already paid should and should not decide. How to turn a wish into a plan that actually happens. These ideas decide more of a life than any subject on the timetable, and no timetable carries them.

Almost every idea in this book was worked out in the last hundred years, most of them after 1940. They are in daily use in medicine, in courts, in engineering and in economics, and the people who use them mostly learned them at work, in their thirties, by getting something wrong first. Where they did go is the adult shelf. Bookshops sell them, thinned down, to people who have already paid for not having them.

We think an eleven-year-old can hold most of these ideas, if the situation comes before the name and the words are the child’s own. That is the bet this book makes.

How the syllabus was made. We did not start from the subjects. We started from nineteen fields that adults work in, among them law, medicine, economics, engineering and psychology, and wrote down the ideas each uses daily. An idea that turned up in three or more fields under different names we called a deep model; seventeen survived that test. The rest are tools that belong to one field and that everyone should still have.

To earn a place, an idea had to pass four tests. It must matter often, or rarely but decisively; a child needs to know that drowning is silent perhaps once, and once is enough. Living must not teach it by itself; a person can be cheated many times and learn only suspicion, never the shape of the trap. It must replace a wrong belief that people actually hold. And school must not already teach it well; we checked each idea against the board syllabus.

Every idea carries its evidence: tested in trials, seen again and again in records, true by how it is defined, or resting on a documented case. Every instruction a child might act on was checked against a source, not against whether it sounded right. Four that sounded right were false as stated, and were fixed or removed.

Then each idea was placed in the year its situation first arrives. At eleven the situations are marks, fairness among friends, the home and the body. At twelve the phone arrives, and the first money. At thirteen the household’s health decisions. At fourteen the choice of stream. At fifteen the board year. At sixteen the first contract a person can sign. At seventeen the vote and the first job. Twenty-one return two or three classes later in a harder form, and five are worked with numbers, only in the last two books.

Before a word of the chapters was written, the list and its order were given to five separate reviewers with one instruction: break it. They found the order wrong in six places, five claims drifted from their sources, and the returns badly spaced. Each was fixed. What you hold is the version that survived.

This book makes no promise about marks. It promises that a child who finishes it will see, in a new situation, the idea inside it, and will know how sure to be. That is what the adult shelf sells. We would rather it were ordinary.

Manthika, 2026

One chapter at a sitting, in order. Each one takes about as long as a television episode. They are in the order they are in for a reason: a later chapter sometimes needs an earlier one, and none of them needs a chapter from another book.

Look at the picture before you read the words. Every chapter shows you the situation first and names it afterwards. If you look at the picture and guess what is going on before you read, the name will stick.

The last page of every chapter asks you to do one thing this week. It is never homework and there is nothing to hand in. It is usually a question to ask someone older than you — not to catch them out, but because they will know something you do not.

You will meet each of these ideas again. The last line of every chapter tells you where. Nothing here is finished this year.

How sure this book is. Some of these ideas were tested on real people. Some are seen again and again in records. Some are true just by their own definition, the way a rule is true once you agree what the words mean. One study this book could have used turned out to have bad data. The people who checked it pulled it. This book does not use it either. The last pages say which is which, and where each one comes from.

If you are the parent holding this book. You can check every idea in it. The last pages say where each one comes from and how sure we are. The one thing that helps is answering the question your child brings you at the end of a chapter, and answering it honestly, including when the answer is that you do not know.