# SM users - quick question

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Yesterday at coop, a good friend gave me her used 4A and 4B HIG and TB of the US Editions since her last kid just finished it and she's cleaning out to make way for new. I got home and saw my 3B sitting here and remembered I switched to Standards for 3rd grade. Is it really okay to switch between US and Standards after each year? Or should I give them back to find another owner and stay with the Standards??

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I remember reading somewhere you should avoid switching after finishing 3B. I think I read that on the Singapore website.

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From the Singapore FAQ:

1. Can we switch from the US Edition to the Standards Edition?
For 1A-2B it is possible to switch from the A book in the U.S. Edition to the B book in the Standards Edition. For levels 3-5, you will need to finish the B books of one level before switching to A book of the next level and not switch mid year. Between levels 5 and 6, it is not advisable to switch editions at all.

So it sounds like you can use the 4A/4B US edition and then switch back to standards for 5 and 6, if you want. The only thing I can think of that's missing from the US edition 4A book would be negative numbers, and it was pretty basic. You could teach it on your own with a number line. It was basically doing < or > and putting numbers in order (including positive and negative numbers). It also gets into things like "____ is 2 more than -10", but doesn't actually do any real addition/subtraction beyond that.

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There is a chapter on statistics and probability in 4B SE and also one on coordinate graphing. The statistics and probability is reviewed in 5B and 6B of the SE. Coordinate graphing is reviewed in 5B of the SE. I think your child would be okay assuming you use the SE for 5A & up.

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They have posted on their website a side by side comparison of what is and is not covered in each book of both editions. This should help you make an informed decision.

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Thanks all! Sitting at home with two sick girls and wondering where to look first. Thanks for all the input. I will keep looking and evaluating.

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