This is an excellent resource and one which i use with my schools very often.
The examples are good, and it also provides a scaffold for Microsoft Word that you can download.
http://www.amathsdictionaryforkids.com/ is also made by the same person and is worth a look.
VocabularySpellingCity is a fun way to learn spelling and vocabulary words by playing engaging learning games using any word list. The most popular activities are Spelling TestMe, HangMouse, and our vocabulary games, available to Premium Members. The most popular word lists are Sound Alikes, Compound Words, Hunger Games and SAT Words. This is a free app!
Want a fun way to help students practice and enhance their web research skills while discovering answers to trivia questions? Then check out "A Google A Day!"
NetSmartzKids is a website set up to teach children and young adults about using the internet safely. Well worth a look when working on cyber safety with kids. US Focussed, but still has much relevant information.
"PurposeGames.com is host to educational quiz and trivia games created by its members. In just a few minutes, you can create your very own game to share with your friends!."