These are estimates and are provided only as a guide. The actual time required will depend on the grade level and the skill level of the students in the class. Pieces can be used alone or in various combinations to accommodate the needs of individual classes and grade levels. Some educators, for example, may choose to conduct several Warm-ups and Activities in sequence over an entire semester. Complementary units are referenced in each Warm-Up and Activity.
Several lessons begin with homework assignments to prepare students for the exercise.
Most units call for explanations or presentations by teachers, but several also involve presentations from students and facilitated discussions led by teachers. The Fact Flashes are a set of fact sheets that provide the foundation of information on which the Warm-Ups and. Activities are built. The Fact Flashes stand alone and can be used to supplement your lessons in a number of ways. The Warm-Ups focus on developing and understanding some basic concepts related to hazardous waste.