These are checks I use in centers and as games to help review place value. They include going from standard form to word form and also going from word form to standard form. This is a good practice for kids and it is teaching them everyday life skills. My ELL students also really enjoy this game. I usually laminate each sheet then cut out each check. I also give the students the answer key and have them check their work as they go. I make sure to model the checking and explain that if they cheat they are only hurting themselves. I hope you can find a way to use it in your classroom.