Medical Tablet PC offers a Tablet PC battery care guide. New users of battery powered Tablet PCs and notebooks in schools may find this guide useful. Here’s an excerpt.
When you purchase a new Tablet PC or notebook it is essential to calibrate and break in your new battery properly. When you first unbox your new machine, the first place it belongs (after installing the battery) is connected to an AC outlet. … keep the unit plugged in for a minimum of 5-7 hours. … Drain that battery until you “force it to shut down” (save your work upon the low battery alert). Then proceed to charge it up again to 100% (this time just charge it to “full”). … the drain to zero. After 3 full charge and discharge cycles, your battery is ready for the road.
If this procedure is good enough for use in medical settings, teachers may find it useful in school settings also.