HAMPSTEAD, Md. (AP) — Hampstead Elementary students jumped and danced, swinging their arms and bodies to the beat of Pharrell Williams' "Happy."

Teachers and staff bopped around with the kids, making their way through the mass of students all while dancing. The song played over a video on the big screen — the people pictured dancing just as enthusiastically as the kids in the room.

And while they may be a little different — all of the kids on the video had Down syndrome — the energy and excitement while dancing remained the same.

That was the point of the celebration on April 5.

Students learn...