I do some of those, and not others. I'm bad about pressing fabric, have never pressed a pattern, but always press my seams. That got drilled into me in high school home economics class. I've never pulled a thread, but many times have torn off the end to get the straight of grain. Can't tell you how many times I bought fabric that had been cut crooked, and wasted part of the fabric because it was off.
My Mom used to be able to make me a dress in a day. I still pull my hair out trying to live up to that.
I think that would be a very instructive class. So many girls have grown up now that never had the benefit of home economics classes to learn to sew and cook. Very sad.