Strategies for probing understanding generally involve mixing instruction with conversation (Renshaw, 2004). In explaining a new topic, for example, you can check for understanding by asking preliminary questions connecting the topic to students’ prior experiences and knowledge about the topic. Note that this strategy combines qualities of both instruction and conversation, in the sense that it involves combining “test” questions, to which you already know the answer, with real questions, to which you do not. When introducing a science lesson about density to kindergarten children, for example, the teacher might reasonably ask both of the following: