Basicallly the problem money. If you look at the Whole Language approach to teaching English which nearly destroyed the understanding of the workings of the English Language. Only about half of the program was taught in schools. Whole language included the study of grammar and spelling but it was too expensive in time and money to implement the program. So basically we got half-language which was sort of a voodoo way of teaching language. "if they read and write they will learn language". "They will absorb grammar and spelling as they read" . Not so much.
Math seems to be taking the same route with the discovery method. You need the basics as well as discovery to become truly Math literate. Discovery might work for 10% of students but the other 90% need both approaches. But it all comes down to time and money and intellectual laziness. But at the same time am extremely doubtful about anything Ontario proud has to say. I am not very proud of splinter group of the Fraser Institute.

I didn't think the Canadian education system would be suffering like this. Hopefully it doesn't come to resemble the United States education system.

Can we trade the Canadian school system for the US one? We are teaching common core for fucks sake! When I was in junior high, they had to put a disclaimer in biology books about evolution. I'll trade ya.