To get the best experience out of SPARKvue HD, it is best to set the device to never sleep (during the lab period). The following is a quick description on how to set the iPad to not sleep.
From the Home page of your iPad, tap the Settings Icon.
From the Settings Icon, select the "General" icon.
Within the General Settings, select Auto-Lock
Then select "Never" from the menu.
When you return to the General Settings, the Auto-Lock should appear as below.