I have found a way to schedule the computers in my class in a way that is fair and equitable. At the beginning of the year, I purchase index cards in a spiral package. I write down the names of my students on each card. The cards show which student can use the computer. Once your turn is over, the card is flipped and the next name appears. Each day the card file shows a new name so no one has to ask whose turn it is anymore. The cards do it for me.