BOOMmaker

Hmm... I'm curious. Three common grammar mistakes people make when writing are:

Confusion of the words "to", "two", and "too",

confusion of the words: "where" and "were",

and confusion of the words: "they're", "their", and "there". 

I've never understood the confusion. No one ever taught me the difference between them, I just read a lot and figured it out on my own. I've never had trouble with it, and it's not like I had an awesome teacher who went out of his/her way to teach me; in fact, I'm homeschooled and I teach myself most of the time. I just don't understand how people (who have English as their first language) have that confusion. Is public school just really bad at teaching it, do people not read like I did and do, or am I just lucky to not have trouble with it?