**Introducing fractions of whole numbers in Investigations vs. Singapore Math**

**I. From the 4th grade Investigations ***Student Activity Book, *"Fraction Cards and Decimals Squares" chapter* *[click to enlarge]:

**II. From the 4th grade Singapore Math**

*Primary Mathematics 4A Workbook,*"Fractions" chapter*[click to enlarge]:*

**III. Extra Credit**

Which is more likely: that Investigations moves on to "Story Problems about 25," or that Singapore Math moves on to abstract, non-pictorial representations?

## 6 comments:

Katharine, you've got the same Investigations image twice.

The child who filled in the Investigations page needs some serious tutoring. Apparently, she thinks that 24 divided by 3 is 3. Also, the misuse of the equals sign is horrifying. 1/4 = 6? Really?

Thanks; fixed!

Yes, remediation doesn't figure into the Reform Math algorithm. Instead it's teach and (perhaps) assess, and then move on.

The math-facts errors on the Inv. pages are bad, but I wonder this: did the teacher discourage the use of what I'll call: the continuous equals sign?

24 / 8 = 3 * 2 = 6 + 5 = 11 - 2 = 9 ^ 2 = 81 / 3 = 27 + 3 = 30 / 5 = 6

It's so easy to slip into doing this. If it's not equal, don't say it is!

Katherine, I've just found your blog. Which Singapore math books are you taking your problems from? Standard ed or US ed? I've just moved to a district where they use Everyday math and two weeks into 4th grade we are struggling. We after-schooled 1st grade previously with US edition, but now trying to figure out which edition will mirror the Everyday Math. Thank you!

Singapore math offers a placement guide and even placement tests: http://www.singaporemath.com/Placement_Guide_s/85.htm

I used 5th grade Standard with our 5th grader (who had EM at school), and it seemed a good match. He and I had done a lot of work at home previously, though.

Remember, EM doesn't stress math facts, so some sort of minute-math routine is important too.

Mostly what I have are the Standards editions, which have some additional data analysis and probability, added to satisfy the California state requirements. Otherwise, I don't think there is a huge difference between the two. See http://www.singaporemath.com/FAQ_Primary_Math_s/15.htm

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