If students do not understand what is taught in the class the teacher should:
ARepeat the lesson once again
BProceed to the next Lesson so that syllabus could be covered
CTeach the lesson again giving more examples
DCheckup the previous knowledge of the students in the topic
Correct answer
D. Checkup the previous knowledge of the students in the topic
Explanation
Checkup the previous knowledge of the students in the topic is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.