I have found very few students to be confident when estimating weights, capacities or distances. The textbook, Units of Measure requires students to do just this, but gives a very useful list of common measurements upon which students can base their estimates. Students are required to estimate heights, lengths, masses and capacities using metric units. The following section gives explanations, examples and exercises requiring students to convert between metric units. The tasks are then repeated, but this time using Imperial units of measure before progressing to ask students to convert between metric and imperial units. The final section requires students to solve problems in a variety of contexts such as how many 50ml glasses can be filled from a one gallon can and how many times will a wheel of diameter of twenty eight inches rotate when travelling one kilometre.
The activities file contains an activity in which students are asked to estimate their own volume and a second which explores a variety of less common units of measure such as barrels of oil and hectares and also considers exchange rates and fuel consumption.