The article covers much more but the snippet on injecting oranges and doing dosage calculations seems like a good, practical, hands-on metric exercise. http://www.sunjournal.com/franklin/story/1068971
Learning to give shots by injecting oranges, the students are quizzed on their knowledge of the metric system in order to get the dosages right. Camp volunteers also help guide them toward what courses, especially math and science, they'll need for some medical careers, Karen Rogers, director of education at FMH, said.
