Before you delete on Step 3, copy the address. Then when you paste, it should reappear. If that doesn't work, try going to the UNABLE TO INSTALL WEB HIGHLIGHTER bookmark below, and copy the URL that they tell you to do.
Then you paste on Step 3, number 4,
The correct URL to paste is below:
javascript:s=document.createElement('script');s.type='text/javascript';s. src='http://www.diigo.com/javascripts/webtoolbar/diigolet_b_h_ipad.js'; document.body.appendChild(s)
Wouldn't it be fun to have our students make a few of these videos and post them on this page? It looks like they have videos from a variety of places. Check out the math addition videos for ideas.