How to be Cool in the Third Grade (Puffin Chapters) by Betsy Duffey

It's Robbie's first day of school - new clothes, new notebooks, and a new chance to be cool. Third grade is going to be great! But it's harder than Robbie thinks to avoid his mother's kisses at the bus stop, and his plan doesn't account for the bully who nicknames him "Baby Wobbie" and tells the whole class that he wears Super Heroes underwear! Will Robbie ever reach coolness?