Students using Key to Measurement enjoy a variety of hands-on experiences related to the English system of measurement. Group projects are included in addition to numerous individual activities.
* Book 1 teaches students how a linear measurement system is developed and then presents interesting and fun activities related to measuring length.
* Book 2 focuses on length, perimeter, and area measures.
* Book 3 develops the concept of area and introduces students to volume.
* Book 4 covers a variety of topics with students weighing objects, measuring capacity, and learning about temperature and time.