Ive bought what I believe are to be most of the maths extension 1 textbooks, so here is my
quick review of each of them
Maths in Focus - Easy to understand, plenty of worked examples, good explanations but no exam style questions and too much similarity in style of questions
New Senior Maths - Easy to understand, good variety of examples and exercises, but no exam style questions I consider this to be the best to learn from
Cambridge Maths - well explained, but I find this book to be the most difficult in terms of the exercises. It definitely covers
a lot of exam style questions
quick review of each of them
Maths in Focus - Easy to understand, plenty of worked examples, good explanations but no exam style questions and too much similarity in style of questions
New Senior Maths - Easy to understand, good variety of examples and exercises, but no exam style questions I consider this to be the best to learn from
Cambridge Maths - well explained, but I find this book to be the most difficult in terms of the exercises. It definitely covers
a lot of exam style questions