Continuity mistake: The first day of school in Neil Perry's boarding room. Charlie Dalton tells Neil "rumor has it, you did summer school." Neil replies "yep, Chemistry." When the chemistry teacher is handing out assignments and textbooks, Neil can be seen sitting in the class. He should have already completed chemistry.
Character mistake: Meek's first name is spelled in the credits as "Steven"; however, the letter being signed by the students accusing Keating of misconduct shows the spelling as "Stephen."
Continuity mistake: When Keating tells the students to draw a graph, they all follow him step by step. For a specific shot, Meeks mimics what Keating writes on the board and draws a bar graph and colours it. Problem is, Keating does not draw the bar and colour it until a shot later. The movie should have been edited the other way around.
Continuity mistake: During the final scene when the boys stand up on their desks, the boy with dark brown hair stands up twice. After Pitts stands up we see him contemplating, then when Meeks stands up he is visible standing up already, but then seconds later he stands up again.
Chosen answer: It is a classroom exercise. He is being followed by pupils and is reinforcing their latin vocabulary by taking them on a tour of the garden and showing them the things that the words actually relate to (edificium = building, flora = flower etc.) This contrasts with his earlier behaviour when he simply had them mindlessly recite conjugations (amamo, amamas, amabat). The point is that this illustrates how the Latin Master has been affected by his contact with Keating and has become a better teacher as a result.
Oscar Bravo