slayerenfiniti:

r47theraven:

purple-inukshuk:

liberallogic101:

spacious-infinity:

lovejoyjohnlock:

daniel-rosenfeld:

sunbleached-jacket:

c-a-bergamot:

redbloodedamerica:

liberallogic101:

#CommonCore This is how the Government gets the unemployment rate.

What. The. Fuck. Is. This. Shit.

what “progressive” education in america is turning into.

THE FUCK’S THIS SHIT

what the hell is that supposed to even mean? I had to read over the explanation twice, and I’m taking algebra 2. 

I’m taking fucking Calculus and I don’t get what the teacher is trying to do.

8+5=13. You can’t take 2 out of 5 and have 3 left over and just sitting in the side with nowhere to go. Math doesn’t work like that. AND, MR OR MRS TEACHER, YOU CERTAINLY CAN’T ADD 3 TO 8+2 BECAUSE YOU STILL GET 13

YOU ALREADY DID 8+2=10 YOU GOT 10 WHY DO YOU ADD 3?! YOU WON’T HAVE 10 ANYMORE YOU’LL HAVE 13

WHICH IS WHAT 8+5 IS SUPPOSED TO FUCKING EQUAL

GODDAMMIT

My post with 129,000 notes is back in my dash again

WHAT THE FUCK IS THIS

Oh look, I failed math I must be a moron. No wait…

ITS THE FUCKING TEACHER

GODSDAMMIT MAN REALLY

This is actually a misunderstanding. What they’re trying (badly) to teach is a shortcut method for figuring out additions you don’t have memorized. Since addition is commutative, you can move numbers until the problem is nicer. The problem here is that they stopped halfway.

For example, instead of teaching a child to add 8 to 5 as 8, 9, 10, 11, 12, 13 – counting five steps up – they instead teach you to look for how many you’d need to hit the next ‘nice’ number. In this case you need 2 to hit 10, so if you do add the two you get a nice round ten with three left over… aka 13.

In theory you can then take this to the next step up and do something like 67 + 35 far more easily than writing it out. You move 3 from the 35 to the 67, and you get 70 + 32, which you can tell at a glance is 102.

This method of grouping addition IS much faster, once you get the hang of it. But stopping in the middle like this is the issue. The poor kid probably did exactly what all of Tumblr did and freaked out when they didn’t know what to do with the leftover 3. A better way to phrase the question would have been “describe the steps in adding 8 + 5.” That way the child has a chance to explain the process instead of just getting marked down.