Whiteboard games can be extremely beneficial in teaching children. "Super Egg" is a good example of this, where you draw two eggs on the board and divide them into six sections. Divide the class into two and ask them questions. Every time they get a right answer, a member of the team gets to shade in a section of the egg. The winning team gets to draw whatever they want to have hatched from the egg on the whiteboard.
Divide the class into twos, giving one member of each pair a piece of paper with the name of an object relevant to the lesson on it. The other team member must then draw the item on the white board, based on the instructions given them by their teammate who must describe the object without specifically naming it. This sort of game encourages cooperation and communication, as well as creativity.
Write sentence fragments on one side of the whiteboard and write the missing word on the other: Say "Good" on one side and "Morning" on the other for example. Divide the class into teams and have each team take turns. One team member stands by the board and is blindfolded while the others must direct them from the sentence fragment to the word that completes it. This sort of game encourages cooperation and provides a physical way of learning sentence structure.
Divide the people in the room into two teams, standing in front of the board. Give the first student a pen and give her a word to spell. Each student must write one letter then pass it to the next student. Each team is writing at the same time and the first one to finish the word correctly wins. This teaches cooperation and speed of thought and is a particularly useful exercise for foreign language classes.