Many teachers have started responding to student work electronically by inserting text or audio files into electronic copies of student papers. The "Comment" and "Track Changes" functions in Microsoft Word is the most prevalent method for such commenting. While there are more powerful programs written specifically for electronic commenting, they do not have the advantage of widespread familiarity and platform neutrality. One advantage of electronic commenting is that it eases the logistics of writing courses that employ drafts and peer response.
For specifics on how to use the "Comment" and "Track Changes" functions in Microsoft Word, see Paul Miller's handout, Electronic Response in Word for Windows (PDF). For Mac users, Electronic Response in Word for Mac Users (PDF).
Electronic portfolios have made inroads both as a means of assessing student work for a class, and for assessing and documenting student fulfillment of a school's broader writing requirements.
Donna Reiss has a portfolio resource page that gives bibliographic references and links to useful sites.
The Bedford Handbook is an online, interactive tool that can be used in conjunction with the print book, but it is not necessary. It has interactive exercises for grammar and other writing skills such as theses statements, research questions, and documentation.
The Voice of the Shuttle is an outstanding resource. It catalogs a wide variety of web reference resources, including guides to critical thinking and argument, style and grammar guides, dictionaries, encyclopedias, thesauruses, quotation collections and more.
Here is an annotated collection of high quality Internet resources selected for their usefulness in providing accurate, factual information on a particular topic or topics.
The best way to find courses in your particular areas of interest is by using keywords on a syllabus database. The database with the widest coverage of writing and technology is the Syllabus Finder at the Center for History and New Media. The keyword "hypertext" returns 6230 syllabi, so you are able to narrow searches with multiple keywords and still find many courses.
The World Lecture Hall has less extensive coverage.