Invaders From Mars (1986)

A small boy witnesses a flying saucer land near his house. The next day, his dad starts acting weird, and has a strange incision in the back of his neck. Soon the police, his mom, and a teacher are taken over by the aliens, as well as others. The boy teams up with a non-zombie teacher to deal with the alien menace. The boy and the teacher call in the military, who blow up the alien ship. The kid wakes up. It was all a dream. Then the alien ship lands for real.

A remake from the original "Invaders from Mars" (1953), directed by William Cameron Menzies.