Mr. Grammatica has made a pointed effort to gauge students' prior knowledge of how to calculate percentages. He has had the repeated experience of students holding onto prior schemes despite their inaccuracy. So on the first day of class he passes around a worksheet to gauge their understanding. Which effective strategy of mathematics instruction is Mr. Grammatica focusing on

Considering students' prior knowledge

Explanation:

instructional strategy

This is often refered to as ways used by teachers to give lectures or delivers lessons for the student's sake so as to be able to meet or achieve the learning objective. Strategies can be very explicit but a teacher can make it less explicit and student centered.

Considering students' prior knowledge

The act of igniting prior knowledge and arousing the interest  of student do bring about an instructional context where students can read with purpose, direction and yearning to learn more.  It is said that a good and effective teachers will use different means to activate students prior knowledge so that during lectures or in class they can  build on what they already know, challenge it, engage in thorough thinking about it, and thereafter refine it.

answer; /// i believe the correct answer is (when one group has an extremely high score at pretest;