First... Schools should not throw technology into the dumpsters. We want to dispose of things properly.
Computers (whether desktops or laptops) will be collected at end of life by either the Ed Tech department staff, or by a vendor with which we have negotiated a deal. Drives will be removed, or data deleted, or an agreement with a vendor to provide this service will be provided.
Peripherals such as printers, speakers, keyboards, etc... are typically left to the school to dispose. Simply take to any reputable recycling center, and keep a listing of what was disposed of, where it went, and the date, on file in case needed.