If you want to learn more about HTML CSS and JavaScript please look at the related links.
See related links for some good websites.
link to learning
wikipedia
Web form is found on these sites for more learning: formsite, webdesignledger, Wufoo and a few others. These should have a good learning experience online.
At what level?
Today, we have several ways to start learning music theory. 8 notes websites have some good online courses for free and a presential school is a good alternative too.
cbeebies
A good site for learning how to do business is the Guardian a United Kingdom based site. Although the best way to learn business is through a college program some websites can help you the the small matters.
Teach your young kid's English with story-telling youtube winklingworld @winklingworldkidsstory
There are many good websites which are specifically made to cater 6-8 year old children. Mostly the websites are associated with child learning and development.
Microsoft offers some excellent free tutorials. You can see some of them at the related links.
It depends on how old you are. If you are around 11-13, brainpop.com is really good. Also someother websites. Just go online and search for "educational websites" and you will probably get good websites...