Joe is 13 year old a student in Mrs. Jewls' class. He is a kid which is known to have strange mathematical methods, but somehow always gets the correct answer. His best friend is John.
He has a big red afro, which covers his eyes, which are only shown in a few episodes. He wears a white T-shirt with a blue collar and blue sleves, and green pants. His sneakers are blue with white soles. There are exactly 55,006 hairs on his head.
Joe is a strange student who seems to be bad at math, but always gets the answers right. As revealed later on, it is just possible that he has strange methods. Joe is also fairly fond of nature, and tries to protect many wild animals during Mr. Kidswatter's lawn beautification project. Often, he uses his hair to store things, such as his lunch in "Oh, Brother", or various forms of wildlife in "Joe 'N' Fro". He seems to enjoy tagging along with John and does whatever he does, including teasing Dana on some instances, and joining him for lunch during "Another Story About Potatoes".
In Sideways Stories from Wayside School, a chapter called "Joe" demonstrates Joe's difficulty with counting. He is kept in after recess by Mrs. Jewls, who wants to help him learn how. After waking up, he is able to count and counts the amounts of hairs on his head.