This cut was made at the wrong angle. The bark was also torn. This cut will not "heal" properly resulting in internal rot. This tree will eventually become a hazardous tree and need to be removed to prevent a student or staff member from being killed or injured.

This branch was cut at the wrong angle. In addition, the chainsaw cut to the main stem will result in internal rot creating another hazardous tree.

Three more examples of unprofessional pruning cuts.

This pruning cut took too much off the "branch bark ridge". This wound will not properly close and result in a tree susceptible to internal rot as well as attack by wood-boring insects!

Check out the damage yourself for more examples of improper pruning cuts and the resulting tree damage.