Nope, don't send that letter. Maybe:
Mrs Principal,
This is to inform you that as of September 16, 2013, our child, DS, will be withdrawing from attendance at Elementary.
We really appreciate your efforts on behalf of my DS, educating your staff on his needs related to his disabilities. We look forward towards continuing to work together to develop DS' 504 plan to allow him to learn in a classroom environment accommodated for his learning and physical needs.
Me
This communicates the need for the 504 asap, and keeps the door wide open to allow him to return. ETA: I masterofnone's version. The one I wrote gets the job done without putting any complaints into writing. I am very, very slow to point ANY fingers. I lifted her first sentence of the 2nd paragraph as complimentary.
Deal with this in a separate communication.
"We have a few items of Mrs. to return as well as a library book, and DS has shoes, headphones, and school supplies which we would like back. Please advise us as to when we might come by the office to exchange these items."
