The activities in this guide are arranged according to the learning cycle .
Every unit includes activities that help develop an understanding of the main concept in the unit.
Every unit also includes activities that help the students apply the concepts they have learned to unfamiliar situations. The activities in these two categories comprise the core material of the unit, and correlate with the core material outlined in the curriculum guide. In addition to the core activities, some of the units have additional activities which at the discretion of the teacher can be used as alternatives to the core activities, for enrichment, or for evaluation. Teachers are not obligated to use any or all of the activities in this activity guide. The activities are intended to be adaptable to the needs of different classrooms.