Do I smell the return of the graphics schools from years ago! I'm surprised to see this coming back, but this was so awesome back in the day. We used to have several graphics and photography schools throughout the years either being a mentor or tutor (depending on whichever school this was). The last ones I can remember, the last
Graphics School was held by Gav and moments. in 2011, while the
photography school was held by Gav, Captain Fabio and Forever.
The last Graphics School, assignments were released from time to time and you'd complete them. Once submitted, one of the tutors will look at your piece and give you a critique on it. Photography School also carried the same format as this one as it was running around the same time as the Graphics School was.
In an earlier iteration of the Graphics School when the section was a lot more popular, the school was a lot more categorized and placed in "Homeroom classes" based on level of ability (Beginner, Intermediate and Advanced) as well as the specific program of use (Photoshop or GIMP).
Don't know if this will help in anyway, but if you need ideas, you should definitely check out any of the previous Schools for advice.
Maybe if you were setting up something like this, it would be a general Art and Design school so people can also be taught pixel art or digital or whatever.