Below, you'll see my second iteration of a vehicle that is being used to knock down a wall. The wall has 78 blocks, and my vehicle knocked out exactly one block.
Students developed an operational definition for "knocked down" that specified at least 40 of the 78 blocks need to contact the floor as a result of their vehicle's impact.
Students developed an operational definition for "knocked down" that specified at least 40 of the 78 blocks need to contact the floor as a result of their vehicle's impact.