The best word to fill in the blank "When we _______ ideas to students, we should be very clear, so that they understand" is "teach." This is because clarity is crucial when teaching ideas to students to ensure they understand the concepts being presented. Effective teaching involves clear communication of learning goals, explanations, and examples to support student understanding.
So, the completed sentence is: "When we teach ideas to students, we should be very clear, so that they understand."
