As students fit together our equivalency puzzles, they practice expressing everything from time and money to operations and fractions...in 4 different ways! Each self-correcting puzzle has 4 simple pieces—students choose a large puzzle piece that represents a specific value…then connect 3 corresponding pieces that express the same value! Each set comes with 12 puzzles and an activity guide. Complete set includes all 5 sets shown, for a total of 60 puzzles. Puzzles measure 5" x 6". Each set also available separately.