# How much math should students know upon entering 3rd grade?

Discussion in 'Third Grade' started by KingCobraKong, Nov 19, 2016.

1. ### KingCobraKongRookie

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Nov 19, 2016

I am teaching math to 3rd graders and after doing an assessment of their math skills more than 75% of them could not understand subtraction using 2 digit numbers.

When I posed a 3 digit subtraction problem they looked at me like I was a tourist from another land using a translation dictionary to ask where the bathroom was.

I'm currently looking for other ways to try and pass the information over to them since I am new to this. However, I am dismayed and troubled over their skills. Shouldn't they understand this by now? or is this level of understanding normal?

Thanks.

3. ### agdamityFanatic

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Nov 20, 2016

I would check your state standards for previous grades to see what they should know. In my state, multiplication isn't introduced until third grade.

For the subtraction, give them manipulative such as base ten blocks. Have them build the first number and physically take away the second number. You will have to model this extensively at first, especially if the problem involves regrouping.

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4. ### czaczaMultitudinous

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Nov 20, 2016

Great advice! CCSS. Doesn't hit multiplication until grade 3. It's ALWAYS best to check state and district standards. Regardless, we must teach our kids from where they are.

A review of place value could be beneficial before moving ahead...this will tie into discussions of regrouping. Start with no regroup problems...when moving on to regrouping, place value blocks and modeling the regrouping by trading tens for ones could help...with the algorithm, rhymes such as 'more on the floor, go next door and get ten more' might help. Graph paper for keeping columns lined up. When you move onto 3 digit, work with regrouping in one place...then move onto double regrouping. After lots of experience with those, introduce subtracting across a middle zero.

5. ### Leaborb192Enthusiast

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Nov 20, 2016

,

Last edited: Feb 19, 2019
6. ### otterpopPhenom

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Nov 20, 2016

This... eek. About half of my upper elementary kiddos have no idea what a noun or verb is. I've had to do a lot of scaffolding to be able to teach what I should be teaching.

OP, what does your school require you to teach? If you have to teach a third grade curriculum still, and you likely do, it could be good to devote 5-10 minutes of your math block to reviewing things like subtraction. That way, they're not getting further behind, and you're still helping fill in the gaps that they have.

7. ### RavensdeskNew Member

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Nov 20, 2016

my district is switching over to Eureka Math (EngageNY) and it is an uphill battle, they don't have the skills to work in an NBT math environment yet. CCSS is the best way to check on requirements.

ELA for third grade is something like 300- 500 site words. Exposure to 1 million plus words through reading a year, writing for 45 minutes at a time (300-500 word essays), write narrative, expository, and opinion,

Math is knowing analog time (introduced in 2nd grade), multiplication, to including using zeros e.g. 0 x 8, 2x3 multiplication, etc, solving fractions, word problems.

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Nov 20, 2016

I think the best thing that prepares them to move forward, is a good understanding of place value.

9. ### agdamityFanatic

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Nov 20, 2016

We started using Engage last year, and it was TOUGH!! I teach 5th, so the gap was huge. I will say, now that we are in the second year, it is soooo much better! There really is a method to the madness, but it didn't make sense until I had taught the entire curriculum. Hang in there!

10. ### KingCobraKongRookie

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Nov 20, 2016

Yeah I'll be honest.

I don't have access to the previous teachers (see my post in General Education).

But thank you for your ideas about blocks and graph paper. I was trying to use that method through words and it just wasn't working. I just hope that there is in fact blocks and graph paper available. I think I will make up some scenarios and see if the information clicks or not.

I was happy that I was able to pass on the information to 70% of the class since roughly that much is IEP students.

Still I don't want to leave them behind either.

I enjoy teaching math, probably due to my background and understanding of it (which is ironic because I HATED it when I was a kid).

11. ### czaczaMultitudinous

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Jun 29, 2017

Deleted. Post was in response to something that seems to have been modified.

Last edited: Jun 29, 2017

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Jul 15, 2017

Base 10 materials are fairly inexpensive, and you can copy graph paper to use.

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