What is ar in a book?
An ar book is an accelerated reader book that at a school you
can take a test on it.
An AR book is a book registered by accelerated reader that you
can take a test on and get AR points for home work if your school
uses AR. Each book has it's own level and points. For example if a
book is 4.5 and gives 5 points, The book is for 4th graders and
gives 5 points. Points is usually used for homework. In my middle
school we have to get 20 points by the end of a quarter.