pedo-, paedo-, ped-, paed-, paido-, paid-
(Greek: child, boy; infant)
The British tend to use paed- while those in the United States tend to use ped-. Remember that the Greek ped- means "child" while the Latin ped- means "foot". Don't confuse this Greek element with another Greek pedo- which means "ground, soil, earth".
2. Etymology: formed from Greek propaideueiv, "to teach beforehand"; from pro-, "before" + paideueiv, "to train, to educate, to teach"; from pais, genitive of paidos, "child".