Teacher starts lesson with questions or activity designed to intrigue students and build on their ideas. Whole-class discussion Student handout To catalyze or build students' interest in the topic of study. To help students think of concrete daily-life examples of the scientific topic. To bring out students' prior knowledge, assumptions, or misconceptions about a scientific phenomenon or principle. Teacher asks students what seasonal changes they have noticed in the environment and writes students' responses on the blackboard.
Teacher wonders out loud what killifishes eat in water and asks students what they think.
Teacher asks students to express their ideas or opinions about a scientific phenomenon or principle. To help students review what they have learned in previous lessons. To help students clarify their thinking or express it in a concrete way, through writing or drawing. Teacher asks students to visualize and draw the change in the air in a closed jar when a candle extinguishes. Students discuss what to observe.