Putting Two 'n Two Together - S1-E1
Continuity mistake: When Carrie asks Kevin "Who's your boss?" in the opening classroom scene, she puts her bag over her shoulder. However in the very next shot, when Kevin tells her he always has a student every year he knows he'll remember, it's back on the desk again.
Visible crew/equipment: At 2:55 in the kitchen scene when Ashley is baking cookies and Mary Kate walks in, a microphone is visible moving across above their heads. (00:02:55)
Kevin Burke's Day Off - S1-E22
Factual error: There is no megatron at Wrigley Field.
Kevin Burke's Day Off - S1-E22
Factual error: This is the first Cubs home game of the season, you can see that the ivy on the back wall of Wrigley Field is green. The ivy is never green like that during the first two months, at least, of the season.