Powers, Ratios and Rates Student Assessment Are you looking for a way to assess your students current understanding of powers (including base 10), ratios and rates?This activity can be used at the start, (as a diagnostic) or at the end, (as a summative assessment) or any where in between, a proportional reasoning unit.This assessment contains a stylistic variety of questions (multiple choice, charts, communication, and critical thinking) to give you an authentic evaluation of where your students