This lab is a great one to use at the beginning of any unit on waves or simple harmonic oscillation after the concepts of period and amplitude have been introduced. It is meant to be student-centered and puts the control of the experimental design in their capable hands. The modeling approach is used here so that the teacher can lead an organic discussion in which the students themselves determine what to investigate.
You may be surprised to not find a formal lab procedure in this lab, this is because the students themselves will be asking the testable questions and designing the experiment to determine the answer. The teacher is there as a guide and to make sure that the student is on the right track.