http://www.good-tutorials.com/ My Instructor gave me this link on my first week of class I enjoyed it and it is a good way to get up 2 a college level in graphic design because a lot of them are harder then the actual assignments I have been doing since then!
Photoshop Tutorial will give you the Basic Knowledge that how to work with the Photoshop at the first stage.There are so many other tutorial which will give you the Advanced knowledge for the Photoshop,And i am sure that you are getting the idea and the informations which are very useful to built your site or the Designs.