One of the many ways to engage students in science is by using probes or computerized devices that respond in real time to changes. In the following learning cycle lesson, an after-school science and mathematics club consisting of about 20 students uses a computerized pressure sensor to evaluate the rates at which effervescent tablets (such as Alka-Seltzer) dissolve. By using the data-collection devices, students were able to see, in real time, the variables that affected the pressure in the bottle. They were also able to apply the “message in the bottle” to effervescent rockets.