Fill your classroom with acts of kindness, compliments and expressions of gratitude with this charming bulletin board set—a perfect addition to your social-emotional curriculum and a great way to create a vibrant classroom community! Attach one of the 3 lid cards to the oversize mason jar and fill the jar with marbles as students impress you with their good deeds. When the jar is full, it’s time for a reward! Set includes 41 pieces—a jar, 3 lid cards, a reward card and 36 marbles—plus a teaching guide. Jar measures 22 1/2" x 35".