While looking for inspiration, I found a lot of creative illustrations of the real number system. But, I was looking for something a little different. I wanted my students to add the information. And, for my older students, I wanted them to even discover some of the information themselves before we added it to the graphic organizer as a class. So, I created my own graphic organizer that would meet all my needs.
For my Algebra 2 students, I plan to give my students strips of numbers. Each strip will correspond to one of the subsets of the real numbers. It will not be labeled however. I want them to take these numbers and try to figure out how they nest on to the graphic organizer. I'm hoping that they will discover for themselves that every natural number is a whole number, every whole number is an integer, etc.
I ran across this in a pile of math resources I was given. Something to think about:
I am using interactive notebooks with my Algebra 1 and Algebra 2 students. So, I have sized it to fit in a composition notebook.

Left Hand and Right Hand Side for Algebra 1 

Real Number System Graphic Organizer. I want the students to outline the boxes with colored pencils to emphasize the fact that everything inside the red box is an integer, even the whole numbers and natural numbers. 

Right Hand Side: So far, I just have definitions (Frayer Model) and a few examples. Obviously, my final draft and sample notebook will be neater. And, the rational numbers and irrational numbers are only a different color because I already had some printed on colored paper. In real life, they would either be all white or all different colors. Trying to overcome my perfectionism here... 
So nice looking! What if you coordinated the frayer model to the color it is being outlined in on the graphic organizer?
ReplyDeleteI just wanted to make sure you are aware that your recent efforts are very much appreciated; I'm constantly starring your posts in Google Reader (subscribed to 150+ math/science ed blogs) as quality stuff I want to be able to refer to again later. The nested set diagram may be fairly standard, but your overall presentation of the real number system in the INB is something I plan to mimic during the first week or two of school!
ReplyDeleteThank you so much! I feel like I've stolen so many ideas from other teachers for so long. It feels good to create something of my own and share it with the world. :)
DeleteIn mathematics, a real number is a value that represents a quantity along a continuous line. The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers such as √2.
ReplyDeleteI thought I saw a link to where you have the frayer model template that you are using, but now I can't seem to locate it. We would love to use this for our INBs this year! Thanks for you help! ~Laura
ReplyDeleteLaura, I posted the link to my frayer model template at the bottom of this post: http://mathequalslove.blogspot.com/2012/08/apeekatmyalgebra1interactive.html. I want to make all my templates and documents easier for people to find and download, so I have plans to make a page that lists them all. I'm hoping that I will find time to do that in the next few weeks. We've been in school a week now, and life's a little crazy. :)
DeleteThanks for the comment!
thats was a great organizer...
ReplyDeletebtw i want to share about irrational number
http://www.mathworksheets.co.uk/048tmdwhatareirrationalnumbers/
I have one slight problem with this though...the square root of 25 is 5 or 5 which means that it would be an integer and NOT a Whole Number, plus 6 and 4/2 should also be natural numbers...the only number that you can really put in whole numbers that isn't a natural number is zero.
ReplyDeleteIf the sign is not given in front of the radical sign, then the answer is the principle root, which is positive. When you have a quadratic equation to solve and you need to take the square root of the number, then you use both roots...5 and 5.
DeleteIf you notice the way this is set up, natural numbers are a subset of whole, integers, and rational numbers. Whole numbers are a subset of integers and whole numbers. When you look at it that way the square root of 25 is both a whole number AND an integer.
ReplyDeleteActually it would be a natural number not a whole number AND an integer if you want to put it in two places, the ONLY number that can strictly be put in whole numbers is zero because every other whole number is Natural.
ReplyDeleteIt is my understanding......
ReplyDeleteSquare root of 25 is the principal root only, 5. We only include the 5 as a solution to square root 25 when you are solving for a variable....x^2 = 25....then square root x = square root 25, which then has two answers, 5 or 5.
I am unable to find the second page of your interactive notebook. I would like the page that has the foldable for vocabulary and examples. I love this! Thanks for your help.
ReplyDeleteSo would I...
ReplyDelete:)