Photoshop practical exercises?

Can anyone recommend any websites (or books) that have specific Photoshop exercises/challenges to perform – as opposed to tutorials.*

I am not sure how practical this is but, ideally, I would like something that gave out weekly exercises and then followed it up a week or so later with possible solutions. I am not averse to subscription based learning like this, but really am looking for something that requires me to work under my own steam.
*
I am in that – sort of – intermediate phase as a Photoshop user – lots of theoretical experience but really feeling the need to kick on.

google "practical exercises for photoshop"

or think of something your interested in like "fire text", google "how to make fire text photoshop", "photoshop fire text"...

yes you can find the huge material for exercise from here
distans.svefi.net/exercises/index.htm
graphicssoft.about.com/od/photoshop/l/bllps508ex6_7.htm

I hope these two websites are enough for you to learn about Photoshop. You can also find videos on Yotube.