The stated learning gap is telling time to the hour, half-hour and five minute intervals. Rock Around the Clock was choosen because it teaches time combined with music and introduces the 1950's era. The estimation, measurement and computation content standard states that in order to develop understanding of estimation, measurement, and computation, the mathematics curriculum should include problems which require students to apply approprite tools of measurement. I chose this unit because I wanted to learn to use the internet for lesson planning.