Access Prior Knowledge
Constructivist Theory states the importance of both the learner and the teacher accessing the student's prior knowledge as a part of the learning process. For the teacher, this can give direction to the lesson showing areas that are already known and therefore can be passed over, or areas that are not known or even incorrectly understood and so need to be focussed on.
Research and experience also show that students learn best when they are given the opportunity to reinforce connections in their understanding, moving knowledge from short to long-term memory.
As with the Hook, this activity should be brief and have a clear focus on what the students do and don't know on the material outlined in the learning intentions. Accessing prior knowledge in only useful if it is used to modify the lesson if required.