These puzzles are great for children to learn numbers in symbol, visual and written form. They are hands on. They promote spatial awareness and critical thinking. Each four piece puzzle shows the numeral, how the amount looks on a ten frame, how it looks as tally marks and the written word. Puzzles cover numerals 1-20. There is some prep work involved in copying, laminating and cutting the pieces. It is a great activity for parents helpers to complete. The beauty is once they are made you have them forever. You can make one set, enough for a small group or a class set. There are blank puzzle pages that you may use for students to make their own in a math journal.