Students using Key to Measurement will enjoy a variety of hands-on experiences related to the English system of measurement. Group projects are included, in addition to numerous individual activities. Includes: Key to Measurements Book 1: English Units of Length Key to Measurements Book 2: Measuring Length and Perimeter Using English Units Key to Measurements Book 3: Finding Area and Volume Using English Units Key to Measurements Book 4: English Units for Weight, Capacity, Temperature and Time.