Final answer:
The purpose of the lesson is indeed to review concepts from the unit, which makes option a. true. Self-check questions aim to help students evaluate their own understanding and are used across multiple subjects and grade levels.
Step-by-step explanation:
The question posed does not provide sufficient context to identify a specific subject, however, the phrase 'review concepts from the unit' suggests that the intended purpose of the lesson is indeed to re-examine and reinforce knowledge that students are expected to have already encountered.
This would make the correct option a. true, as the notion of a review session is to revisit previously taught material to ensure comprehension and retention.
Self-check questions are commonly used as a means to help students assess their own understanding of the material. These questions often align with key objectives or concepts from a unit, providing a form of formative assessment for both the student and the instructor.
They can be found across various subjects and grade levels, to confirm students' grasp of subject matter before progressing to more advanced topics or before taking summative assessments like tests or exams.