Mixtures, weighted percentages, and varying speeds make problem solving difficult. The resource give learners a strategy for tackling these types of problems effectively. 

An activity in which average speed is calculated for a ball sliding along an inclined plane. This speed is compared to various instantaneous speeds along the incline.

A table listing the average radius of orbit for the nine planets about the sun; expressed in astronomical units. Data can be used to calculate the orbital speed or the orbital period.