Re: Three year olds can't read
I was taught by my dad to read words in the Sunday paper, sometime around the ages of three to five.
That was all very fine & terribly splendid, then on attending primary school, I was hobbled & marked down as a slow reader thanks to their instance of teaching i.t.a. (Initial Teaching Alphabet) , by second year at primary the more "advanced" pupils moved onto writing from the other line of the blackboard. I think at some point I decided to jump streams, my older & wiser teacher sternly told me I shouldn't be doing it, but I don't think she explicitly told me to go back.
The following year was I moved up to junior school & I don't recall it being in use there, so I presume all made the transition, although with hindsight a few may have been left totally floundering.