Back in what historians refer to as "The Day" Isaac Newton got hit in the head by a falling apple (if he's such a genius then why is he lying under an apple tree? It's dangerous!) which inspired his theory of gravity ... or so the story goes. Also, kids used to give their teacher an apple ... these days I doubt teachers trust those little demons with produce in their evil little hands!
This appears mainly, because of privacy and security issues. With the current events, casting on the general safety of the public, the apple appears to prevent any citing by potentially dangerous personas. To search for school images go to the main school website.