I run a similar event at the secondary school I work at as part of a yearly thing called "activity days" - it's to give the younger first and second year pupils something different to do while the older ones are away on study leave before the exams. I ran it for the first time last year and it was very oversubscribed as a one day event with 30 pupils, it was a lot to get through in a day - I covered pakoras, base, pilau rice, naans, chicken tikka masala and poppadoms, using C2Go recipes as a starting point.
This year I'm making it more manageable by doing it over two days and reducing the numbers with 10 pupils each day, and plan to use the glasgow recipes as a reference and cover the same sort of things but scale it right down so they each make base sauce and pilau rather than watch me do it then dish it out to them to use, as it can get a bit boring watching someone else cook and prattle on.
Having a word at your local college or place that does evening classes to see what kind of cookery classes they offer, and try and get a breakdown of what they cover and when - it could be useful to you when working out timings and expectations?