Figure 4.

Box plots reveal differences in the distribution of KI scores after students use Science Skills instruction and assessment tools. Group 1 (white boxes) used the Science Skills tools only after they were assessed midyear (n = 19); group 2 (gray boxes) used Science Skills tools from the beginning of the course, were assessed at midyear, and continued use of the tools through the end of the year (n = 18). Note that the dark lines represent the median; the boxes include 50% of the data, representing the 1st to the 3rd quartile; 90% of the data is within the whiskers; and open circles represent outliers. Figure 4 shows the distribution of the same data set as is analyzed in Table 2 and Figure 5.