How many public school teachers with bachelor degrees (or even a Masters) in education are qualified to teach any of these things? They get a teachers edition with step by step instructions, same as we get. High school educators may be more specialised (the science teacher may actually hold a degree in science) or they may coach basketball & need to stay busy the rest of the day.
Qualified? Well, on paper, all of them are. Else, they could not have an education degree from an accredited university. If you think reading a teacher's edition of a textbook is all it takes to properly educate a child...well, I guess you homeschool.
Now before you start blowing cranial capillaries on us, I have more complaints about the typical public school system than Carter has liver pills.
I subscribe to a different theory. No one person or set of people is qualified to teach a kid everything he/she needs to learn. I'll stop short of the "It takes a village" mentality, but I also acknowledge that there are things someone else can better convey to a child than I can no matter how many teacher textbooks I purchase. I instead feel that it is the job of the parent to be informed and involved in the child's education; to know what is being taught and how; to augment the in-class experience with real life and/or extra instruction; to watch the curriculum like a starving hawk and correct it when necessary (ask our young'un about lincoln sometime); and to leave the micromanagement of every facet of the school experience out of it.
It doesn't bother me to see our kid struggle with some of the work. Teaches discipline, perseverence, study habits, value of work and research, lots of things. In addition, she learns to deal with the class bully, the class drama queen, the class slut, the class Romeo, the class nerd, the class clown, the class brainiac, and every other personality that doesn't live inside these walls. That has value. She learns to roll her tail out of bed on a schedule, to go somewhere for several hours that she doesn't want to be, to do things she doesn't want to do, with people she may not like, and to stay at it when she'd rather be elsewhere. If you don't think those things have value, ask your own employer if you can disregard them. She learns that just maybe everything in the big bad world doesn't revolve around her, that she is (in the grand scheme of things) no more special than the next person, that there are not separate rules for her, and countless other real world lessons that I have yet to see a home school be able to address.
Interstingly enough, homeschooled are some of the most sought after students by institutions of higher learning. Wonder why?
One question before I address this. You ever been to college?