Our experience of this lesson plan
We performed this workshop with 40 pupils around the age of 16, divided in groups of 4-6 people.
We only had about 20 minutes per group, which unfortunately was not enough to let the students do the ICT-part of the workshop because the Tracker program needs some familiarizing before it can be used fluently.
Nevertheless the workshop was a success, the students were very engaged and every group got a few usable measurements.
By not limiting the options in making the parachute you get some very interesting designs, some of which work, others fail miserably. But this is all part of the exploration.
This is a very good option to let the students explore velocity and exploration in an interactive manner, especially if you have a little more time.
It is not suitable for younger pupils since the mathematics involved is not easy.