The United States implements a little bit of socialistic tendencies in our everyday lives. Once example would be public schools.
I agree that our public school system in the U.S. exhibits "socialistic tendencies". However, there is (fortunately) a huge difference between the U.S. public education system and a fully state-owned (i.e. purely socialistic) education system. That difference is that private schools remain a legal alternative in the U.S.
In truly socialist societies, private ownership of the means of production is illegal -- i.e the state owns 100% of the means of production. As such, if the U.S. were to outlaw private schools, then I would say that socialism has taken over education -- fortunately, we are not there yet.