Bear in mind that a motion-picture screen is much larger than a television monitor and care must be taken in the video production to allow for the best possible end result. Small defects in the video can be quite objectionable when projected on a larger sceen. This is a difficult question to answer because it depends upon what you call resolution, and what your frame of reference is. Static resolution in the amount of detail present in a scene that contains no motion. Dynamic resolution is the amount of temporal information contained in a scene having movement.
Film resolution is measured in millimeters, but video resolution is measured in megahertz.
You can use easy charts at any local camera rental company to figure out the best results for your particular piece. Your students have a considerable edge over any students educated in a traditional classroom.