Divide the class into teams or just divide it in half. Have each team come up with a name. Write the team names on the board with vertical lines separating areas. Each team needs to form a line and one person from each team will go up to the board at a time. Ask the students trivia questions, math problems, spelling words, etc. They write the answer on the board and the first one to get it right gets a point for their team. Play until you run out of time and the team with the most points wins.