Matthew Martin is back, along with parents who embarrass him, a sister who bosses him, and the girls in his class who torment him.
Although he still cuts up with his friends, Matthew is taking life more seriously. When the class studies ecology he learns that even minute changes in the ecosystem can have lasting effects on the environment. A recycling project becomes not only interesting but important.
Matthew also finds that small changes in feelings can make a difference when he looks at his pal, Jill Hudson. Why, when Jill says “Earth to Matthew,” does he feel so funny?