Just reach into a mystery box to pick a math problem—and target curriculum standards in just a few minutes each day! Great for daily warmups, extra practice, math centres and more, each of our sets includes 100 question cards featuring fun-to-solve riddles, puzzles and word problems—all targeting level-appropriate curriculum standards for math. Each set even includes a guide with an answer key for easy self-checking, plus a 7-1/2"w x 7-1/2"d x 6-1/2"h mystery box. Grade 1