Does not have to be extravagant!
Remember teacher gifts do not have to be extravagant... yes I am a teacher so I speak from experience! ... i have always been a proponent of it is the thought that counts! For my children's teachers I have always done a hanging or potted plant since graduation is in the srping/summer and it is always nice to get a "flower". i also have my children make them a homemade card with their own sentiment inside!