Why not have a potluck? Just ask the parents and other teachers to bring in a dish. You can honor them at a meeting, special night for them, or during the day!
Also you could talk to their co-workers, students, and former students and make a scrap book for them.
Hi! Does anyone have any Ideas for retiring teachers? We have 4 teachers retiring this year. We have a limited budget but would like to recognize them. One teacher has been extremely active in the PTO and the other 3 have not. Your advise is always so helpful. Thanks