How did Humphrey feel about it being the first day of school?

When the students entered the classroom on the first day of school, why was Humphrey surprised? Did Mrs. Brisbane seem to be surprised? What did Humphrey not understand?

What homework had Mrs. Brisbone given the students over the summer? What was the purpose of the assignment?

Why didn't Humphrey have a box to share with the class? How did he feel about that?

Why did Mrs. Brisbane talk to Holly and Rosie after letting the rest of the students out for recess? What special job would Holly have?