Monica Graves is retiring from Harwich Community Primary School and Nursery, in Barrack Lane, after 30 years.
Mrs Graves - known better as Monny by staff - has dedicated decades to helping students learn and assisting staff with school fetes.
A spokesman from the school said: "You have reached a milestone with finishing your 30 years with us.
"Monny, you have touched the hearts of many children and families in Harwich with your kind-hearted, caring way.
"We know that there will be many people big and small, young and old whose lives you will have touched and left a happy, long lasting memory."