My students need a lot of "hand-holding" as they are learning to convert one system of units to another, such as converting miles per hour into feet per second. The method on this worksheet walks them through the process, step-by-step, so that they can successfully accomplish this goal.
It basically uses a dimensional analysis approach, in which they need to select conversion factors (such as 1 mile per 5280 feet, or 5280 feet per mile) by which to multiply an expression without changing its v