Ex-Student: "Mr. G, you gotta give [my current math teacher] some advice. He doesn't know how to teach. Could you share some of your methods w/ him?"
Me: "Mmmmm, he's old school man. Just gotta learn his system and work w/ it."
Me: "I'll see what I can do."
Ex-Student: "So you shared some of your methods, eh?"
Me: "Mmm, I don't know what you're talking about. [Your current teacher] is old. He doesn't listen to me."
Ex-Student: "Hmm, I bet he told you to say that."
Me: "What are you talking about?"
Ex-Student: "Well he's started to use some of the methods you used to use in class. For example, he's started to use exit slips to end. Thanks for that."
Me: "Really!?" [WTF!?]