Can I ask what you have done regarding to marketing yourself? Ofcourse IM can work well etc but it would be beneficial as well to get stuck in the networking department. If you do gigs at schools, do you talk to teachers/parents etc? Did you visit other schools to show what you do or talk about it? Do you have a website? Are there other opportunities for you, businesses etc where you could do your gigs? What is the feedback on what you do? Why do people like you coming back at the school once a week to see and listen to what you do? What makes you stand out and be different? Maybe it would be a good idea to write down your skills on one side and interests on the other (this idea I picked up recently from this forum and it's great to see written down what you'r good at etc.) Basically I would say: get out there very activily, network and spread the word (if you haven't already
)! Good luck.