End It, Begin It

I introduced this game to my class last week, and they beg every day to play it.

I call it END IT, BEGIN IT, and the rules are simple.
The students are divided into groups.
I write a word on the board. One of their sight words.
The first group has five seconds (I count down aloud) to collaborate together and come up with a word that begins with the last letter of the word. If they give one, I write the word on the board, and give them a point. Now the next group has a go. If that group doesn't come up with one, I skip to the next group.
The winning team gets to be "in front" of the line whenever we leave the room.