I am moving to a new school next year that has more resources, support, and is more competitive- there is no negativity associated with this move. I have been at my current school for several years, and have built really strong rapport and relationships with my colleagues, students, and community.
My colleagues know about my move, but how do I approach announcing my departure to my students/community in a positive way? What are some key points to include? How do I approach the students who will be heartbroken/upset?
"I've accepted a position at another school (don't say where!) which is a huge opportunity for me going forward. Thank you for the opportunity to grow with you. Stay in band, keep working for whomever takes over after me, and I can't wait to see you all at the state marching contest."
Say it at the end of the end of year concert. Make the rest of this year about the kids, not about you. Don't say a BETTER opportunity, don't play up a bigger school or anything else. Just a bland "another position." Every bit of how YOU phrased it in your message shows your move is all about YOU and not about anything else - so keep that ego strongly in check.
Of course, you do need to realize - word WILL get out before you make the announcement, as the position will get posted and people will start interviewing. I'd recommend "I'm not able to discuss that right now." as your consistent response to those questions until your concert is over.
I would wait until after the spring concert and make that about celebrating all the good that happened during the course of the year. Save it for the last two weeks of school. Depending on how far your spring concert is from the end of the year- it could possibly make the end of the year difficult if you announce too soon. But people WILL know by then. But like the person above this post said reply with "Im not able to discuss that right now."
Have been in your position a few times (never looked to move. Had great kids like yours but admins sought me out and offered not only large increase in salary but also great facilities, budget, etc.)
Students and parents who are your strongest supporters will be sad when you leave but will be happy for you and your new gig.