Good question about the “average demand” thing. I took that to mean 3x the average demand of other jobs… I think that is something you could certainly ask about though. What state are you in? Do you have a regional partner who might have a better understanding of the “local” landscape? That might be a good place to start!
In terms of your original question, in my experience my school was eager to offer computer science - I think the advocacy page presents all the stats you really need! it is kinda a no-brainer for most districts, especially if they have someone like you who WANTS to do it. I think the costs are the only hang-up. SO… with that in mind, here are the costs I can foresee:
Technology - specifically something to DO coding on. If you don’t have a lab, I would recommend getting a set of chromeoboks. My students use chrome books every day and I have access to laptops but the chromebooks are SO FAST! They are also easy on the school budget.
Training. Code.org is moving into a “sustainable” training policy. Have you already been trained? Then GREAT! If not, check with your regional partner to see if the training will cost anything next year. They are going to great lengths to make it still accessible to teachers, but you would want to present that cost too. Make sure you mention the on-going support during the school year too involved with that training.
In terms of the pitch, district people love buzzwords in my opinion. I would focus on the following:
STEAM - Computer science is a liberal art that connects ALL STEAM fields. It allows students to creatively problem solve and build skills that are transferrable to other content areas. (this is one of my favorite articles that talks about coding in biology)
College and career ready: As more and more jobs are being taken over by computers, we need people to program those computers. Also, programming can lead to good jobs that don’t necessarily require a degree.
Computational thinking - it isn’t just about programming though, this course teaches students how to think computationally. It isn’t that every student will be a programmer, BUT they do need to be able to think like a computer so that they can tell a programmer what they want a computer to do.
Those are my initial thoughts - let us know how it turns out! Good luck!!!