I’m teaching the AS content for the AQA Physics A-level for the second time this year, and have recently had my students carry out the core practical to “find a value for g using a free fall method”. I used the same approach as I used last year, using a “g-ball” as shown in the video below, but have simplified the worksheet that I used. (The one I used last year asked the students to carry out parts of the uncertainty analysis as they were going along, whereas this one separates data collection and data analysis more clearly). If you want a copy, click the link: acceleration-due-to-gravity-worksheet (Thanks to David Brown, @staffdb66 from Twitter, for spotting a now-corrected typo).
This simpler worksheet seemed to work much better – the students were able to follow the instructions for collecting the data and I had 14 students, working in pairs, complete the practical successfully in a 50 minute lesson.
I’d welcome any comments on improving the worksheet further.