I use this with my beginning guitar students to help them learn which note corresponds with which note on a given string and fret combination. You could also have them write down which finger is placed on which fret to ensure they know the proper hand shaping for chords or progressions.
Note that this only uses the first position notes, but you can also specify starting from a certain point on the next. For example, "assuming this is starting at the fifth fret, which notes are being shown?"
This page provides an easy way to check in with students' knowledge on mapping the guitar's fretboard.