In the table below, the activities are stated in the advised order. The activities 1-7 are mandatory and required to build the knowledge on sound. The activities 8, 9 and 10 are meant to test and evaluate the knowledge built in this subunit. These activities can be done independent from each another. Students can choose one or two activities and for instance present these to the rest of the class.
| File ID | Activity Name | Inquiry Type | E-emphasis |
| i.2.1 | Resonance | Guided Discovery | Engagment |
| i.2.2 | Fundamental frequency, double bass | Guided Discovery | Exploration |
| i.2.3 | Fundamental frequency, guitar | Guided Inquiry | Explanation |
| i.2.4 | Melde's experiment | Interactive Demonstration | Extend / Exploration |
| i.2.5 | Harmonics of the guitar | Bounded Inquiry | Exploration / Evaluate |
| 1.2.6 | Standing waves in air, air column | Bounded Inquiry | Evaluate |
| 1.2.7 | Standing waves in air, soprano saxophone | Guided Inquiry/ Open Inquiry |
Elaborate |
| 1.2.8 | Timbre | Open Inquiry | Elaborate/Evaluate |
| 1.2.9 | Beats | Open Inquiry | Elaborate/Evaluate |
| 1.2.9 | Tuning the guitar | Bounded Inquiry | Elaborate/Evaluate |