Wednesday, February 11, 2009

ratios and estimation

12.10.08. The ability to make quick estimates of quantities is a powerful skill to have, in science and in everyday life. Students used their knowledge of ratios to perform long unit conversions, obtaining estimates of quantities such as the total number of students at MS 88, and the population of Brooklyn. Starting from considerations like "there are about 4 people per household," "about 30 households per building," "about 10 buildings per block," etc., students estimated the population of Brooklyn to roughly within a factor of 2!