The averages fell, with the Dow falling almost 400 points, and Jim Cramer is helping investors navigate the day's downturn. First, could the off-price retailers be on the money in this market? Cramer's eyeing names like TJX, Burlington and more to see how they are faring. Then, Cramer's closing out his series on stocks that fell big in August that may be buying opportunities at these levels. Plus, Cramer turns in his homework on Vistra and Coursera.