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#1




Common Core Math
This has probably been covered already but...
WTF is this bullshit!!! It seems like math for people who can't grokk math. Can't they just put all the slower kids in a different class and teach them common core? Question: 7*3 7+7+7=21 WRONG 3+3+3+3+3+3+3=21 RIGHT Has common core eliminated the commutative property of multiplication? Also acceptable is making 7 rows of three dots (bit not making 3 rows of 7 dots) and then counting the number of dots. What the fuckity fuck fuck? 
#2




Dude, what decade are you living in?
Also, who told you that was Common Core? 
#3




Depends on the context and how one wishes to integrate mathematics into young peoples' lives.
7*3 == 3+3+3+3+3+3+3 == 21 3*7 == 7+7+7 == 21 They equal the same thing, yes. But having seven three dollar bills is obviously not the same as having three seven dollar bills, even when your total is 21 dollars. Unless, of course, you're suggesting that the commutative property is never introduced or explored at all in CC math. 
#4




Angry idiots who have no idea what "common core" actually entails, and are pissed off at badlywritten worksheets.



#5




I'm not sure what you're getting at. This is my first exposure to Common Core Math. I didn't realize how dumbed down it was.
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#6




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Who exactly told you that what you were looking at is mandated by the Common Core standards? 
#7




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AFAICT, this is waving the white flag on math and just dumbing it down to the lowest possible denominator. 
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Also, at least the kiddies are counting dots, there's a logic to that. In my day Sr. Doris just made us memorize them and recite them aloud. Over and over again. 
#9




So explain to me why one is wrong and the other is right?



#10




First you explain why you think that is representative of the Common Core standards.

#11




As others have said, I think you are confusing one badly written worksheet with the whole of Common Core. Common Core Third Grade requirements for multiplication:
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Overall, I like the direction common core is going. It integrates algebraic concepts throughout, rather than springing on them in grade 9. It also strives to improve number sense and finding strategies as opposed rote algorithm application. ETA: The bolded green part covers teh commutative property as well. Last edited by Strassia; 09102018 at 03:02 PM. 
#12




The fact that one lousy teacher demands that 7x3 be 3+3+3+3+3+3+3 and not 7+7+7, does not mean all teachers teach the same way, nor does it mean that "common core" math demands this.
Anyway, what does 7 times 3 mean if not "7 times" the number "3?" 
#13




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CMC fnord! 
#14




I'm just learning what common core is now.
So in the last ten years have we seen improvement in the US global math rankings? NOPE! We have been sliding even further behind. https://www.politifact.com/virginia/...mathandscie/ Quote:
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Apparently learning the multiplication table is a waste of time. Memorization generally is not regarded as learning. Memorization is essential to learning. In much the same way that muscle memory slows down the game or slows down a fight (see martial arts), brain memory also slows down the math game and lets you operate at a higher level. 


#15




I only ask because you weren't clear about where you saw this. It could have been on a child's homework assignment. It could have been on rightwingoutrage dot com, how do I know?

#16




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Once you understand what multiplication is, there is really no need to keep making graph papers full of dots and counting them out. After that it is in fact about memorization. My kid's math homework looks like an art project. 
#17




In order for me to be properly outraged, I'm going to need to see the context in which this is marked "WRONG."

#18




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If that is the way it is being taught then that is common core. 
#19




Well if they actually grade it like this then I can see why you're upset. Do they really mark the first answer as wrong?



#20




Why can't it mean "7 three times"?

#21




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Is this complaint specific to this particular teacher who is blaming common core for this travesty? Why are some of the posters defending this idiocy as common core if this is not representative of common core? 
#22




#23




Does it have the Common Core stamp in the corner of it?

#24




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Previous thread in GQ: What Common Core math technique was that check mocking? In that thread, even sven said Quote:



#25




The last time I looked into this, I found cites for mathematicians defining it both ways.
So if a teacher is marking one way or another wrong they're enforcing an arbitrary and nonuniversal convention. And they're just going to have teach the commutative property soon anyway... 
#26




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Once you understand multiplication as a concept it is largely a waste of time to NOT use the algorithms. Algebraic concepts have been a part of 3rd grade math for at least half a century. Division is mostly accomplished through algebraic concepts, it also requires you to have almost memorized the multiplication tables to do quickly and effectively. KNOWING that 7*8=56 and 7*9=63 makes it a lot easier to know that 60/7=8 plus some remainder. You don't have to sit there and do 607=537=467=397=327=257=187=117=4, then count up all the 7s you subtracted to get the number 8. You stop doing division that way after the first week or so. What the common core people call memorization can also be referred to as knowledge. 
#27




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#28




The thing about math is that it is frequently true that if you apply ANY concept incorrectly, you get the wrong answer.

#29




If common core upsets the OP this much, I can only imagine how he'll react to aristocratic core.
__________________
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#30




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Look at the two sections of third grade requirements that I highlighted. If the are working on the red section and it is a word problem about something that only comes in groups of 3, and they did but adding 7 three times, they missed the point of the exercise. If it is just a written problem of 3x7, then it is poorly written. One of the issues/features of Common Core is that the implementation is entirely up to the the states. Last edited by Strassia; 09102018 at 03:36 PM. 
#31




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My kid was asked to answer math questions and to show his work. One of them was: 7*3= If you were to try to find the answer to this, you might think that the easiest way to get this answer while showing all your work would be to add 3 numbers together. Nope that would be wrong. You have to add 7 numbers together. 
#32




Damuri Ajashi, lots of people have asked how you know this is Common Core, without explaining why they're asking. Modern math teaching is trying to actually teach kids the math concepts and not just memorize tables. There's good reason for doing this, even though I find it amusing when I give a clerk $20.12 when the tab is $9.87, and watching the bewildered look on their face after they've entered into the register that I simply gave them $20.00 even.
When I learned math back in the 60s, there was starting to be some of that Tom Lehrer "new math" where we learned about sets and different number bases, but lots of the basics were still memorizing multiplication tables for the singledigit numbers and rote learning of a mechanism to adapt those to numbers with more digits. Those work for getting the right answer, but don't do much for acquiring a numbers sense. And is the old way really important? If I want to multiply a couple of multidigit numbers, there's never a calculator more than two feet away from me. So modern math teaching is trying to give kids a sense of how numbers work, not just having them memorize an opaque and nearly obsolete process that can yield the correct answer. And finally, this has been going on for quite a few years, while "Common Core" is just standardizing the best practices across the states. 
#33




He got partail credit for getting the right answer but lost points for getting it the wrong way. I don't care about the actual grade, its third grade. I care about the confusing and incorrect message its sending to my kid that there is some significance to the order in which two numbers are multiplied.

#34




You're kidding right? There is a common core stamp? How does that prevent the teacher from applying stupid standards to the answers. I think she got the homework straight out of a teacher's edition book and she was following the answer key.



#35




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7*3=3+3+3+3+3+3+3=21 Perhaps we need to teach the teachers a bit better. Because they seem to be turning Common Core into a very rote form of math where 7*3=7+7+7=21 is wrong. 
#36




What you have there is a bad teacher. And she was a bad teacher even before Common Core, and was probably teaching in exactly the same way. The fact that she's a bad teacher has nothing to do with the fact that 42 states got together and agreed that it'd make sense for all of them to teach the same things at the same grade levels.

#37




I've watched a few YouTube videos on how math is being taught these days. Though I had no freaking clue what all the squiggles and dots meant when they were just put in front of me, after some explanation I think it's pretty clear that these are novel ways to explain math in ways I rather wish I had some exposure to when I was in school.
The comparison to martial arts is apt. Martial arts is not simply about repetition and rote memorization of various techniques. If you want to execute some kind of takedown, it's reasonable to expect a decent student to show not only that they can execute the technique if the attacker starts in ready position; steps forward with a single punch; and basically pauses until the defender can execute the technique they have memorized. They should understand both how to adapt the technique to unplanned situations, and grok why the technique works to begin with. Learning how imbalances among several axes on someone's body will make them fall down  that is, the basic principle of a takedown  adds context to the action and allows a person to tinker with their technique and experiment with the principles in order to become better. So, in the same manner  teaching kids some of the principles behind math in order for them to know how to solve the problem in various ways seems like a good idea; demanding that the multiplication tables AND NOTHING ELSE DAMMIT be pounded into their head seems like a poor idea. Last edited by Ravenman; 09102018 at 03:55 PM. 
#38




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Eggs come in cartons of 12. If you are just counting cartons and figuring out how many eggs you have then you can do X*12 or 12*X and get the right answer. But if have a more complex question it matters if they understand how the concept is being applied. Common core shifts some of the emphasis from memorizing math facts (they are still taught, just not as emphasized) to math sense. Understanding how numbers work and why. There are a lot of math algorithms that are either no longer taught or emphasized. My algebra teacher showed us the algorithm for finding square roots once, just so we could see it. I have never used or or seen it since. Is that problem? My 6th grade just brought home a worksheet on factoring. When I did it, I would have had to shown how I divided each large number by the possible factors to determine if there was a remainder. His wanted him to explain how he eliminated each one: Didn't end in 0 or 5, added digits and weren't divisible by 3, etc. Those were "tricks" I learned in SAT prep. He even had ones that I never saw before. His way was much faster and, if done properly, will give him a better basis for understanding how bases work later on. 
#39




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Or it may be that the children are being explicitly taught that X*Y means X Y's added together, and not Y X's added together, though by the magic of the commutative property these turn out to have the same value. In which case, okay, but I'm not sure there's a standard, generallyunderstood meaning of what the order in multiplication is supposed to signify. 


#40




Keep in mind that this is an approach used when first learning multiplication. For those newly exposed to the concept of multiplication, the associative, commutative, and distributive properties of multiplication are a foreign concept.
It is perfectly natural, then, to present the expression "3 x 7" as "three groups of seven" and "7 x 3" as "seven groups of three". Remember, these kids don't know that multiplication commutates, so they don't intuitively know that "3 x 7" is equivalent to saying "7 x 3". This concept is yet to come. "Seven groups of three" and "three groups of seven" may have the same total, but they are not the same. 
#41




I dunno, in both cases you have $21 of rather poorly thought out counterfeit currency.

#42




What is missing for those parents who complain about these sorts of problems is that none of them actually attended the lesson where these concepts and methods were taught.
This problem wasn't just spring out of the blue on their precious little angel, from a vengeful teacher who takes pleasure marking papers wrong. It was done at the end of a hour long lesson describing the method they want to kids to use on that worksheet along with a whole host of examples. Today we will learn that 3 times 7 means the addition of 7 threes in a row. Next week we might point out that this is the same as 3 sevens in a row, but that is not what we are learning today. Today we are working on this particular understanding of what multiplication means. If they just wanted to know the answer the kids could google it on their cell phones. Now I can understand if your sweet little nugget of blessedness spent the whole lesson watching Jim in the next chair over to play with his booger, and then came home to ask you to do their homework you might not guess the lesson plan correctly and feel the wrath of a thousand suns that the teacher had the temerity to mark it wrong. But for the purpose of that lesson, it was indeed wrong, and your adorable dumpling of innocence needs to spend less time looking a boogers and more time paying attention in class. 
#43




It also might be easier to see it from the point of view of higher mathematics. If I was teaching factoring polynomials, I might ask
Solve X^2  X 12 = 0 for X. The correct was would be to factor it into (X4)(X+3) = 0 so that X = 4 or 3 If the student solved this using the quadratic formula, I would mark it wrong because he didn't demonstrate an understanding of factoring polynomials. 
#44




Right. Education isn't always about getting the "right" answer  it's about learning specific processes or skills.
Last edited by Johnny Bravo; 09102018 at 04:22 PM. 


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#47




This is "the old way".

#48




As of 2012, math scores in the 9 year old set were growing by leaps and bounds. So I'm dubious about the evils of common core.
The problem is that the gains dissipate in high school. https://www.motherjones.com/politics...tskevindrum/ Ok, but how are we doing internationally? https://www.motherjones.com/kevindr...eandreading/In 8th grade math, American students ranked ninth out of the 56 educational systems that participated in the testing, behind five Asian countries and three others. Average scores are up 17 points since 1995. The OP calls that outrage? This is outrage, courtesy of an American Spectator piece of spam that I once subscribed to for my amusement: According to Common Core, softcore porn is preferable to Jane Austen. That's outrageous if true, and is swallowed whole by gullible morons. Google it: that proves it! BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. BUY GOLD. Last edited by Measure for Measure; 09102018 at 04:44 PM. 
#49




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TLDR: Why the fuck are you insulting my kid in a discussion of common core you fucking waste of sperm? 


#50




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It was never great but it used to be better. So tell me again how great common core math is. I don't really notice a difference in common core reading except they seem to be teaching more critical reading skill earlier. its not that hard to fuck that up I suppose. 
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