From One Parent to Another

I'm married to a high school teacher and I teach college. I had a couple of teachers who impacted my life, and my daughters have each had these experiences as well. For the most part, I'm a fan of teachers.
But there are a few things that some teachers do that absolutely drive me bonkers as a parent, and I don't understand what they're thinking. For instance, why is it the teacher who always gives the most busy work for homework--write the definitions of 25 Spanish words 15 times each--who doesn't check to make sure it's done? How is a child supposed to feel motivated to do the work when they don't get credit for it? What about the teacher who assigns a complicated project and then never gets around to giving the student their grade on it? Especially when that assignment is what keeps your child (and you) in during a school vacation. Why do some teachers persist in this age of, hopefully, body image awareness, asking kids to reveal their weight to the class during math or science projects? Why don't they see through the kid who is a master liar about why he forgot his homework, has to sit this project out, etc., when his classmates all tell each other he deserves an Oscar for his performance? In fact, it's so often the class bully who appears to be a master at teacher deception. No wonder so much bullying goes under the radar.
I know today's teacher is asked to do more than anyone should reasonably have to at their job, what with the state requirements that get everyone from the superintendent down into a state of apoplexy. But can they just remember from time to time that they'll get more parental support if they're fair in their dealings with students? Or remember what it was like to be a kid?
What would you like teachers to know?