This is actually 2 songs- "Area & Perimeter" and "Circumference & Diameter". You can use these songs to introduce these math topics or to reinforce and review later on. I am currently using these songs with my 5th and 6th grade English Language Learners to help them understand math concepts taught in their math classes and to help them review for our state math test. Learning the meaning of math vocabulary and being able to sing it and act it out can help any learner retain the information. Have fun!