Final answer:
The described scenario is an example of Formative assessment, which includes practices like feedback on practice problems and Grasp Checks to assist in students' learning and comprehension.
Step-by-step explanation:
The instructional component described in the question is an example of A) Formative assessment. This type of assessment is intended to provide feedback and guide the students' learning process rather than evaluate what they have learned at the end of an instruction period. Formative assessments include practices such as Grasp Checks, which review the comprehension of concepts and skills, and 'Check Your Understanding' questions that, along with practice problems, provide opportunities for assessment on key topics as students are learning.
Moreover, these assessments often include Self-Checks that encourage students to analyze and assess their own understanding, and Section quizzes that test the application of knowledge. By walking around and providing feedback and corrections, the teacher is engaging in real-time assessment to help students improve and understand the material more deeply.