A high school wood shop/construction class is an interesting place. I had an idyllic vision of hardworking students all happily busy at a task. Well, duh, why would this class be any different than anything in life? Some people worked, some people didn't. Some worked really hard all the time, and others worked reluctantly or with much prodding. The wood shop is a microcosm of life, I guess.
Classes are only an hour long, add in lates, cleanup, packing up and other interruptions, and it is seldom you'll get a full hour of work from anyone. Throw in the occasional assembly day schedule which means all classes are shortened or a "SpringFun Day" for the whole school, and the project grinds to a halt for a few days.