Physics: Cost Effectiveness of Light Bulbs
After a brief introduction to electric power, I tasked students with figuring out which of several light bulbs is the most cost effective. I provided them with the cost and estimated lifetime for each bulb and the current rate the local electric company is charging, along with some Kill-A-Watts they could use to take some measurements.
Chemistry: Reversible Reactions
After a quiz on limiting reactants, students used the textbook to start defining reversible reaction and equilibrium.