Post grads and powerpoint
Welcome to our Wiki family - sometimes you won't get a response, however when you hit a hot topic - conversation will emerge dynamically.
I'm a strong advocate of freedom of choice. As educator's I don't feel that we have a right to force students to purchase proprietary software. When we teach ICT skills, I feel that teaching institutions have an obligation to accommodate the needs of both free software and proprietaty software users.
I work largely in the developing countries in the Commonwealth (thats 49 out of the 52 Commonwealth Countries) and I know exactly what you mean about folk being new to technology and software.
That's why I think your project is a great resource and YES - you need to stick to basic information. You should take a look if the CCNC course materials will meet any of your needs.
Good question regarding the differences between skills of high school students and adult learners. I think that this would differ significantly depending on the country. For example in the US I would expect to see significant differences between school leavers and adults. However, the situation would be very different, for instance, in the Cameroon.