It's nothing but class at the Blue's Clues house, because they're playing school. Teacher Blue has a lot in store for Steve, Periwinkle & Tickety. Story time, art time, snack time, and even a field trip. Where is Blue's class headed? While playing a game of Blue's Clues to find out, they'll read, paint, practice the alphabet, and do lots of things that make school cool.
When Steve says You Know, one day I want to go to college, meaning he's most likely between 18 to 21 and it's a reference to the upcoming Season finale from the season this episode was from called Steve Goes to College where Joe took over.