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 Elmsprings Joined: Oct 2011 Posts: 708 Senior Member
Elmsprings

Joined: Oct 2011
Posts: 708
Senior Member
01-15-2017, 09:40 PM
 #1

How many subtraction strategies do you teach? I have a 2nd grader---and some of these strategies that she is suppose to learn are just plain crazy and have like 15 steps!!! What???!!!

 Tounces Joined: Oct 2005 Posts: 2,718 Senior Member
Tounces

Joined: Oct 2005
Posts: 2,718
Senior Member
Math
01-17-2017, 06:08 AM
 #2

What curriculum do you use? I'd probably just start with one for the basic facts. Do they know those yet?

 Elmsprings Joined: Oct 2011 Posts: 708 Senior Member
Elmsprings

Joined: Oct 2011
Posts: 708
Senior Member
GoMath
01-17-2017, 03:41 PM
 #3

Her teacher is going straight through the book, I think.

 slg Joined: Jan 2010 Posts: 1,440 Senior Member
slg

Joined: Jan 2010
Posts: 1,440
Senior Member
strategies
01-18-2017, 04:08 AM
 #4

We teach only three, but encourage and guide them all toward the traditional algorithm. (I am talking multi-digit subtraction.) We teach the drawing of place value blocks, ungroup first (35-14 = 30 + 4 over 10 + 4) and then the algorithm we probably grew up with.

I've heard multiplication has even more strategies! We were told to teach the curriculum with fidelity that first year, but teachers balked at teaching so many strategies so admins looked at it and relented by telling us to pick no more than three.

 Lakeside Joined: Oct 2009 Posts: 5,197 Senior Member
Lakeside

Joined: Oct 2009
Posts: 5,197
Senior Member

01-18-2017, 11:21 AM
 #5

As a sub, I don't have to make the decisions...but sometimes I wish I could!

I absolutely agree there are too many strategies in the basic curriculum! We are forcing many children to do problems in a more complicated way when they already understand a less complicated one. And I believe the primary result of that is turning them off to schoolwork (and losing the support of their parents as well).

I think we should teach the traditional algorithm first. It got to be "traditional" because it's efficient and it works! If that doesn't click for some kids, I think we should pull them aside and teach them an alternate one - and exactly which alternate one should be based on what we know about how that particular kid thinks - until we land on the right one for them.

 Keltikmom Joined: Mar 2013 Posts: 9,577 Senior Member
Keltikmom

Joined: Mar 2013
Posts: 9,577
Senior Member
Math
01-24-2017, 05:39 AM
 #6

All the "new" programs teach multiple strategies. I go by "here is a strategy that may or may not work for you." Personally, I think each person comes to a way to eventually use a short-cut strategy that works for them but in second grade, they don't usually figure it out. They need more actual practice with numbers and the last two programs I have taught don't do this.

And during testing, what do I see? Half of them instantly default to using their fingers.

 Miller Joined: Oct 2005 Posts: 11,975 Senior Member
Miller

Joined: Oct 2005
Posts: 11,975
Senior Member

01-25-2017, 07:36 PM
 #7

go math is horrible. some of the strategies I showed for one day and told my kids that if they understood it, awesome. If they didn't understand it, it's ok. Isn't that a shame we have to do that?

 MAMASUZE Joined: Sep 2010 Posts: 225 Full Member
MAMASUZE

Joined: Sep 2010
Posts: 225
Full Member
SPED group
01-29-2017, 06:39 PM
 #8

I have a group of 12 sped children, and they are having the worst time with math strategies... I think they need two (strategies) at the most just incase they get stuck and simply can't find the answer. My little babies are at a loss right now with subtraction with regrouping, I'm about ready to ditch whole GO MATH series and just teach plain ole subtraction. This program is not designed for students with difficulties.

 Elmsprings Joined: Oct 2011 Posts: 708 Senior Member
Elmsprings

Joined: Oct 2011
Posts: 708
Senior Member
Why so many?
01-29-2017, 07:31 PM
 #9

I just don't get it!! At least I know I'm not alone in my thinking now!! Thanks for your comments!!

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