Help students in grades 1-3 better understand synonyms with these quality Synonym Self-Checking Puzzles. These shark-shaped puzzles will only fit together if you match up the synonyms, making them a fun, hands-on activity students can play individually in centers. These self-checking puzzles come in a durable storage box and are a great addition to classroom learning games. Cardboard. (2 pcs. per puzzle, 30 puzzles per unit) Puzzles, 8" x 3-1/2"; sturdy storage box, 8-3/4" x 4-1/2" x 2-1/4".