An exercise book is a notebook

Notebook

A notebook is a book or binder composed of pages of notes, often ruled, made out of paper, used for purposes including recording notes or memoranda, writing, drawing, and scrapbooking....

 that is used in school

School

A school is an institution designed for the teaching of students under the direction of teachers. Most countries have systems of formal education, which is commonly compulsory. In these systems, students progress through a series of schools...

s to copy down schoolwork and notes. A student will usually have a different exercise book for each separate lesson

Lesson

A lesson is a structured period of time where learning is intended to occur. It involves one or more students being taught by a teacher or instructor...

. The exercise book format is different for some subjects - for the majority of subjects, the exercise book will contain lined paper

Ruled paper

Ruled paper is writing paper that typically consists of horizontal lines meant to separate lines of hand-written text, and vertical lines meant to provide margins or to act as tab stops....

 with a margin

Margin (typography)

In typography, a margin is the space that surrounds the content of a page. The margin helps to define where a line of text begins and ends. When a page is justified the text is spread out to be flush with the left and right margins...

, but for other subjects such as mathematics

Mathematics education

In contemporary education, mathematics education is the practice of teaching and learning mathematics, along with the associated scholarly research....

, the exercise book will be blank or will be lined to aid in the drawing of graphs, tables or other diagrams.