Hello all you artisans. I hope you guys are well. I teach a couple of Music classes in a middle school and my program is primarily based around guitar playing. Our Yamaha guitars are decent enough to learn some cowboy chords. However, every now and then they get damaged. This guitar in question has a broken headstock. The break runs along the tuners and did not go through to the other side. My thoughts are to fill the crack with some white glue, slap on a clamp and hope for the best. Am I wise to also drive a screw in through the side of the head to better secure the break? The job doesn't have to be pretty, just effective enough. Here are some pics for a better idea and I look forward to a reply or two. Cheers!