This is a virtual lab activity that will help students conceptualize the notion of a wave moving from point A to point B. It utilizes the "Wave on a String" PhET platform which has many useful wave parameters with which the students can play and experiment with. The most powerful connection that will be made through this lab is that the speed of a wave can be calculated by multiplying the frequency by the wavelength, a concept that is difficult to picture without doing an actual experiment.
The benefits of this lab are that they can be done with no equipment set up or by a substitute teacher. If you are looking for an straight-forward way to have the students play and experiment with waves...look no further!