R.L. Stine 
Rotten School #3: The Good, the Bad and the Very Slimy [EPUB ebook] 

April-May June Loves Bernie Bridges . . . she just doesn’t know it yet.She’s the coolest hottest girl in the school and Bernie thinks she should go to the dance with him.April-May won’t even be seen with Bernie because he’s such a troublemaker.So Bernie makes her a promisea really scary promise. He says he’ll stay out of trouble for a whole week if she promises to go to the dance with him.Bernie is shaking, quivering, quaking. Can he turn into a goody-goodyespecially when it’s time for the famous (against the rules!) super slimy slug race?