This is true in our country as well. The schools teach half the year on Identity Politics and Communist Ideology, then the basics like math get shoved aside. The kids go through the new standard corr math called "Math Makes Sense", which is ironic to say the least, cause the way they do it makes no sense.

Front end approximation math: 300 +300 = 600, to the rest of us, but, FEA math teaches that

300 + 300 = 1000

because the nearest rounded "5" number to 300 is 500, and 500+500=1000

I guess that type of math has worked for the Bank of Canada since '73