If you have tried teaching HTML basics to year 8 students (13/14 year olds), for some it is a difficult concept to grasp, and for others it can be boring.
Hackasaurus is a fun program that teaches HTML and CSS to tweens. It is interactive and using the “X-Ray Goggles” you drag into Bookmarks, once activated it brings any web page to life. Just hover over a section of any web page, press “r” to remix that section and you can tinker about with images and text, rewriting web pages and having lots of fun. Try it!