Students cutting wood using a hacksaw - GIF

[Philip Davies]

This makes me spit, just look at the set up, the way the vise is wobbling. And I bet there’s not a handsaw anywhere, or chisels. I saw technology teaching degenerate from thorough grounding in basic shop practice, to colouring in worksheets, (this was “design”.) When kids wanted to make, say, a box, they had no idea how to join the sides. The girl does not look learning disabled! But she hasn’t the sense to turn the plank over! However, what makes me spit even more is the saying, “…those who can’t, teach.” I taught and I can. Those who quote it are inverted snobs.

[ductape]

“…those who can’t, teach.” I taught and I can. Those who quote it are inverted snobs.

That phrase is very old and may be more about understanding than ability. Depending on the situation, it didn't apply then and certainly doesn't now.