Students usually fight over time at the computer. In order to make computer time go more smoothly, have an empty coffee can at the center with clothespins with the students' names on them. Place a hanger above the computer area and have students attach their clothespin to the hanger when they get to the center. At the end of the week (after all the students have had a chance to use the computer) put the clothespins back into the container to start over again. This way you can look at the hanger to see who still needs to use the computer and your students will each get a chance without the quarrels.