Complex sentence: In addition to normal academic courses, he also took Manual Training, a course which included both freehand drawing and mechanical drawing in addition to working with tools using both wood and iron as well as blacksmithing.
Split into simpler sentences: In addition to normal academic courses, he also took "Manual Training", a course which included both freehand drawing and mechanical drawing. This course also involved working with tools using both wood and iron as well as blacksmithing.