We all know what happens when you give a mouse a cookie.  But, what if you take a mouse to school? He'll want your lunchbox and a sandwich, to do some math and some spelling. And, of course, he'll want to go back to school the next day! 
Ages 4-8

Froggy Goes to School by Jonathan London, 
illustrated by Frank Remkiewicz 

Froggy is so nervous about his first day of school, he has a terrible nightmare the night before.  But, School turns out to be fun, even if Froggy does have a lot to learn.
Ages 4-8

buy the book
in the US or UK

First Day Jitters by Julie Danneberg
illustrated by Judith Dufour Love

Sarah Jane Hartwell does not want to go back to school. "I dont know anybody, and it will be hard..." she complains as she hides under the covers.  But, Sarah Jane isn't a student.
Ages 4-8

Timothy Goes to School by Rosemary Wells

Timothy is very excited about his first day of school, until he meets a classmate who practically perfect.  How will Timothy cope?
Ages 4-8

Miss Bindergarten Gets Ready for Kindergarten
by Joseph Slate,  illustrated by Ashley Wolff

Miss Bindergarten vigorously prepares for the first day of school as her 26 prospective students (one for each letter of the alphabet) do the same.
Ages 4-8