I looked it over because I've attended online webinars that Dr. Simon has delivered and always find the helpful and enlightening. Since I may have to do a webinar someday, I thought I should take a look at what she has to say here.
It occurred to me as I made my way through the slides, that though intended for people making in-person or webinar type presentations, there are some points that are relevant to online course content built with HTML as well. Here are a few...
"People remember content better if they contribute to it in some way."
"Present from where they are, not where you are."
This is not a new concept from a teaching perspective. Check out Chapter 3 in How People Learn by Bransford, Brown and Cocking. You can read it online at http://www.nap.edu/openbook.php?isbn=0309070368. They point out the value of building new knowledge on what students already know and can relate to.
"The more you invite them to participate, the more memorable the content, because they will remember content over which they have ownership."
"Attention drops significantly after the first 10 minutes… Vary the pace and format to re-set this starting point."
This is particularly relevant to instructors using video online. I've heard about some instructors who post an entire 2 hour lecture video online for students to watch. That's deadly. Even face to face, it's really hard to maintain a high level of attention to one person speaking without any variation for that long. Think about ways you can break up the information so that something surprising or out of the ordinary happens every 10 minutes or so. The surprise should relate to the content you're presenting and should enhance the learning point being made -- an interesting but little-known fact, for example, or the way a thing looks at a certain stage of development. If you use clickers in your classroom, a quick check for understanding could be the break you need. In a Collaborate session online, a quick survey can accomplish the same thing. The possibilities are endless.
"The audience will forgive you for sub-optimal design, if you offer relevant content that means something to them."
I've addressed only 5 of the 26 points made in the Slideshare. So check it out and see if it doesn't trigger some more ideas for you.