The assignment for Week 4 of Teach the Web has merged with the assignment for Week 5 as the whole project took much longer than expected.  My idea was to put together a small Popcorn project on how knowing a little HTML and CSS can let you augment public domain ebooks to provide an enhanced learning experience.  The video does not go into details on how to do this, but gives some basic ideas as to what is possible.   The next stage of this project might be to provide step-by-step instructions for finding public domain ebooks, unzipping the epub file, editing its contents and then re-zipping the files.