July 26, 2016 at 10:03 am #3573
We had a professional development session yesterday and had a lively discussion about the use of the term “improper” fraction. I mentioned that this vocabulary was no longer used in the standards and that led to a discussion of what should be used as an alternative to this term – I thought that we were now calling them “fractions greater than one” but one teacher insisted that a fraction had to be less than one.
Would someone mind clarifying these definitions and what the writers of the standards intended for teachers to use to describe “13/8”
Thank you in advance.August 16, 2016 at 3:33 pm #3576
A fraction does not have to be less on than one, that’s for sure! As for improper fractions, there is no prohibition on writing things like 2 1/2. Indeed, it would be hard to avoid. But the standards do not use the term “improper fraction” because it promotes the misconception that a “proper” fraction must be less than 1. The notation 2 1/2 is just a shorthand for the sum 2 + 1/2, and should be read that way. Then rewriting it in the form 5/2 is accomplished the same way as for any sum of fractions (with the understanding that 2 = 2/1).
The standards also avoid talking about converting between proper and improper fractions, because the word “convert” suggests you are actually changing the number. The number stays the same, there are just different ways of writing it, depending on your purpose. Students should be able to deal with fractions written in any form, but there is no need to insist they write them in one particular way.
I’m not sure you can avoid the term “improper fraction” entirely. I’d be interested to try though.August 27, 2017 at 3:54 pm #4271
I was looking for an alternative name to use with my students. I don’t like the term, “Improper Fraction” because it implies that less-than-one fractions are proper. There’s a connotation that there’s something wrong with 13/8 and that it should not be used.
For this coming year, I’m going to try using the term, “Overflow Fraction.”August 27, 2017 at 8:39 pm #4272
That’s better than “improper.” But I’m wondering why you need a separate term at all. My first instinct would be to use the term “fraction” and point out that some fractions are less than 1 and some are greater than 1 (and, for that matter, some are equal to 1 . . . 5/5 = 1 is an important thing to know).August 28, 2017 at 2:33 pm #4280
I completely agree – both 1/4 and 5/4 are fractions. For all intensive purposes and clarity for students, I think that having them recognize that both are fractions is truly important. I used to have so many Algebra students wanting to change 5/4 to 1 1/4 and the only way that I could convince them that it wasn’t necessary and actually “mathematically detrimental” was when we were using 5/4 as slope – WAY easier to graph! 🙂August 28, 2017 at 8:27 pm #4281