But you can't know if an answer is good enough unless you know what the right answer should be, or at least how to derive it. Otherwise, you're stuck in the situation of having to accept any and every wild answer a kid might dream up, because to insist he even gets close is now white supremacy.The concept of mathematics being purely objective is unequivocally false, and teaching it is even much less so,”
Most mathematics used in life is not objective but merely choosing the best option.
Not how many more miles can I drive my car......but do I have enough gas to reach the next gas station.
Not how much are the six items in my shopping cart going to cost?......but will the $20 in my wallet cover it
Not how long will it take me to bring my car to a stop.......but do I have enough distance to the car in front of me?
Most math in life is an estimate and a decision based on that estimate.
Teacher: "Johnny, if you put 30 pills in a bottle for your grandma and she has to take 3 of the pills every day, how many days will her prescription last?"
Johnny: "Green".
Teacher: "Good, Johnny, good. You got an A on that quiz. Now go become a pharmacy tech who counts pills for your grandma".