The complete set of activities for Experiment 2. Asterisks indicate changes from
Experiment 1. From top to bottom, these are: requiring students to graph a histogram, replacing
the qualitative problems, including prompts in half the insight problems and eliminating the IQ
problem, eliminating a graphing activity, providing direct instruction through a homework assignment,
and increasing the time for the standardized score activities so students in both conditions
could work on problems from both grading and sports contexts. Finally, four classroom
teachers taught the curriculum instead of the researchers.