A little boy is doing his math homework and saying:

“2+5, the son of a botch is 7.”

“3+6, the son of a is 9.”

His mom overhears and asks: “Son, what are you doing?”

Boy: “I’m doing math homework.”

Mom: “Is this how your teacher taught you?”

Boy: “Yes.”

Infuriated, the mother asks the teacher the nest day: “What are you teaching my son in mathematics?”

Teacher: “Right now we are learning addition.”

Mom: “And why is my son saying 2+2, the son of a is 4?”

Teacher: “What I taught them was, 2+2, the son of which is 4.”