a man writing on a chalkboard in front of a group of students

Prompt 1: a teacher writing on a green chalkboard while a student stands behind him. the teacher writes a formula and then proceeds to write "the rate of change of x with respect to time" and "the rate of change of y with respect to x" on the board. focuses on the process of learning and teaching math.

Prompt 2: two men are shown standing in front of a chalkboard, with one man writing on the board and the other man reading from a paper. the man writing on the board begins to write a series of equations, while the man reading from the paper points to the board and says "i'm sorry, i'm not sure." the man writing on the board continues to write, and the man reading from the paper points to the board again. the man writing on the board then writes the word "thank" on the board.