Build and practice your students' math vocabulary with this set of 20 riddle cards and related activities for math tools and terms. Solve a riddle a day to give your students daily practice with both math vocabulary and comprehension skills like inferring, & identifying key ideas. Here are some ideas for using these math riddle vocabulary riddles in kindergarten and first grade!* To introduce new math vocabulary as you begin a new topic or lesson. Starting measurement? Read and solve a ridd