This is such a FUN and interactive lesson to show students how to add and subtract polynomials. The backgrounds are colorful and eye catching, the information is informative and useful (as there is a real world application) and the students have such a good time going to the activboard and interacting with the lesson. There is also a short 2 minute video embedded in the lesson that allows students to watch someone else demonstrate the process. I've found this is sometimes better than me explaining it. I think you'll love it and think it's worth the expense! Enjoy!!