A method of assessment, could write the objectives or ask the students to write them.
Monitor assessment at key lesson points throughout the lesson or for a conclusion and discussion session .
A method to assess student confidence on topics delivered throughout the year or at exam time.
Students shade with a pencil where they feel their understanding of the topic is, this could be after a small test or exam questions related to the topic
They can then identify areas to revisit and following this update the chart, hopefully giving them more understanding and confidence going into the exam.