Are your students having trouble with lesson 3 in the 2nd module? This lesson can be very difficult for students. I took the concept development problems and created a matching game. Students match the expression to the word form and the tape diagram. Then they will have the answers to fill in the blanks to a document that includes concept development problems. My students then glue this form into their "source" book or math journal. That was my mini-lesson! Now my students have examples to use while they are completing the problem set and homework. You can also use this as a math workshop center in later lessons. Students will also have an answer key to check their work.