For part of the block the standard students used white boards to review integer operations. We did further review by focusing on mean, median, mode, and range problems that included negative numbers. Finding the range was a challenge for some. When the range was from 10 to -11, some would say the answer was -1. We then went back to revisit the definition, plotted the values on a number line and saw the range was 21. 10 – (-11).