Here are a collection of video tutorials that where aired for free on the net by Creativetechs. There are eleven classes in all, including the bonus lesson on colour correction. I have also provided links for the smaller i-pod versions of the classes too. (Please note the main & i-pod classes are identical, just made at different resolutions). Each class runs for about an hour, and afterwards you can view the Q&A sessions that took place after each weeks class. 

Creativetechs regularly run free webinars on Photoshop, Indesign, Fireworks, Dreamweaver, Lightroom etc. They also have classes about photography and design in general, and offer one on one training (for a fee). There are also a wide variety of recorded classes available for purchase. If you like these video tutorials, please consider visiting their site @ 
Code: 
http://creativetechs.com/

Creativetechs 10 week Photoshop course (inc. Bonus Colour Calib class) :- 

Week 1 : Photoshop Basics - 
Week 2 : Layers - 
Week 3 : Selection Basics - 
Week 4 : Advanced Selections - 
Week 5 - Layer Masks - 
Week 6 - Pen Tool & Shape Layers - 
Week 7 - Drawing Tools & Brushes - 
Week 8 - Retouching - 
Week 9 - Colour Correction (part 1) - 
Week 10 - Colour Correction (part 2) - 
Bonus Video - Colour Calibration Theory -