Sonic's Schoolhouse is an educational game where the Sega mascot teaches mathematics, reading, and spelling. The game is entirely played from a first person perspective which allows the player to explore the schoolhouse and enter four different classrooms. There are two rooms for math, one for reading and one for spelling and each room has a total of ten questions which are written on chalkboards.
In the math rooms there are numerous numerals dancing around and the player has to pick up the right number and carry it to the chalkboard where said number is missing from the equation. The spelling room works the same but with letters that have to be matches with the unfinished words written on the chalkboards. The reading room contains balloons with pictures that has to be matched with the words written on the chalkboards. In each room the player has to avoid Dr. Robotnik who steals the answers when he gets close.
In addition to the classroom lessons there are two recess mini games that can be accessed in the backyard. These are made available by collecting recess power ups in the classrooms. The first one is a 3D version of concentration where the player uncovers question marks to reveal objects and the aim is to make matches of two of the same kind. The second is called ring hunt and simply involve collecting a certain number of rings without getting caught by any of Dr. Robotnik's henchmen. It is also possible to make field trips on a school bus. Aboard the bus are a number of animals and clicking on any of them allows the player to see videos that give information about the animals.