Facilitating student-to-student learning to address lack of coaches

[hfroot]

(originally raised in slack https://codebar.slack.com/archives/G08CQ5KFD/p1648026041861849)

[hfroot]

Has been done in west London for students preparing for a boot camp so all doing the same exercises. (6-9 students to 2 coaches). Initially some were disappointed because they expected 1-1 but after a few sessions like this it went well