The student's strategy of using a diagram to record how many lemons are needed to make a small and large glass of lemonade, and if Mary has enough lemons works to solve the task. The student's answer, "so Yes," is correct.
The student shows correct reasoning of the underlying concepts of the task. The student demonstrates understanding of four lemons to one glass, eight lemons to one glass, using addition to find the total number of lemons needed, and comparing that total to fourteen lemons.
The student correctly uses the mathematical terms diagram, key, dozen.
The student makes the mathematically relevant observations, "2 lemons left over," and, "12 is a dozen."
The student's diagram is appropriate to the task and accurate. A key defines the lemons and glasses.