Students reviewed metrics. specifically how to convert from smaller to larger and larger to smaller using the ladder method which is just moving the decimal in the direction you are going.
Below are two links to youtube videos. On is on the development of the metric system. The other explains how to convert.
http://www.youtube.com/watch?v=MekxJse2vgs
http://www.youtube.com/watch?v=DQPQ_q59xyw
Have a great weekend! Go outside!