Those are some interesting examples of the relationship between meaningfulness and engagement which I have seen Giselle use!! I know that she stresses that it is the "quality infrastructure" for effective teaching. For those who are interested in learning more about it - I encourage you to look at "Changing the Way You Teach, Improving the Way Students Learn" by Giselle Martin-Kniep and Joanne Picone-Zocchia!
Everybody's talking about this book, so I guess it's going to be my next Must Read! There have also been a couple of folks talking about the TPACK model as well--which I've been finding resources for. I'm loving how all of these collaborative things are feeding one another--from the Ning to the Blog, to Twitter, then Social Bookmarking then back to here! Love it, love it, love it!-Mike