If ATP is the coin of the realm, how can I get a lot of it?

For the class on cellular respiration, students get a bag full of marble run parts. Their goal is to build a run that maximizes the transfer of kinetic energy of the marbles to kinetic energy of the spinners (from a given height). After making the connection to the transfer of chemical energy that is taking place in the cell (glucose to ATP), students gain an understanding of the trade-off between glycolysis and the full aerobic respiration process. Glycolysis is fast but inefficient; whereas, cellular respiration is slow but very efficient.