Today Ben had a quiz on Slopes of Lines. Ben worked diligently. At one point he paused and asked if the y-values are supposed to go in the numerator. I directed him to a formula on the wall which confirmed he was correct. When Ben completed the quiz, I graded it with him and we reviewed it. Ben got a 73%. I expected Ben to get a better grade. When I told him that, he said he had a headache and a stomachache. He made a calculation mistake of 7-(-1)=6 (instead of 8). He also was to draw a line from a given point, but he drew it from the origin instead. I think Quiz grade isn't a true reflection of his knowledge. We will continue to build on this next week.