You pretty much have to do at least one or two presentations per class. Usually, if you do a group problem that isn't marked, the teachers expect to to get up in front of the class to present your results. If it's unmarked, they don't tell you until 5 minutes before you finish the question that you have to present it to the class. I used to be shit scared of presenting before, but after you get loads of practice it's a breeze.
For the marked presentations, they're not like high school speeches that are in essence spoken essays. They're mainly a summary of your findings and in group projects you're expected to present for at least 20 minutes.
For the Advanced Diploma, theres a class called Project Group and you have to ask a company if they would like to be your client and as a whole class you have to compile a marketing plan for them. A class would have about 10-15 people for this module. At the end of the report (which is usually 1 inch thick, single sided, 1.5 spacing, size 12 font) you have to present the findings to your business client and have to organise the event (event management) and choose team members to get up in front of a business crowd of about 50 or more people and talk for about 90 minutes.
Even though, Business (Marketing) has a lot of theory work associated with it, there is a huge focus on presentation skills such as stance, body language, voice projection, clothing and a lot of others.
Um... I think I might be leaving a lot of stuff out though. If you think I've missed anything else, I'd be happy to answer any more questions.
(BTW. To those people out there who have never gone to TAFE and who think it is FAR below uni. Think about how you would handle wearing a suit in a room thats 40C hot and chatting non-stop with no palm cards about a 1 inch thick report and at the same time follow a Power Point presentation that you cannot see because you're standing on a stage. While at the same time acting as if you know about what you're going on about to a bunch of business professionals with 20+ years worth of lifetime experience?)