This activity can help children with angles. Instead of measuring angles on paper, this can illustrate angles into a read life demonstration. This is active learning because as children close the door the angle changes and they can now measure it.
FIRST GRADE - Telling Time- stick a hula hoop to the white board, and write numbers around the inside of the circle to make a "clock". You can make little notches around the inside of the hula hoop to practice telling time to the exact time.