Mrs. Sinclair

Mrs. Sinclair was Greg's math teacher in his third grade who taught her class tricks to make it easy for them to remember tables. Whenever Greg faces a difficulty he uses the trick, but it slowed him down in his work. Her trick was to sing this song:

'Eight times four is thirty two

Thirty-two, thirty-two

Eight times four is thirty-two

And now you know it's true!' (To the tune of "Mary had a Little Lamb")

Trivia
She only appeared in Diary of a Wimpy Kid: Cabin Fever.