## Tuesday, November 5, 2013

### Number Line Apps & Online Tools

Number Lines (and Number Paths for Kindergarten and 1st grade) are a vital visual tool in mathematics.  They aren't just for ordering/sequencing numbers (see Common Core Standards 2.MD.6, 3.NF.2, 3.NF.3, 3.MD.1, 4.NF.6, 4.MD.2, 5.G.1, 6.RP.3, 6.NS.6, 6.NS.7, 6.EE.8, 6.SP.3, 7.NS.1, 8.NS.2).  Once children learn the sequence of numbers, number lines can be very useful for addition and subtraction.  Many teachers believe that number lines are only supposed to be used in the early elementary, but number lines are such a wonderful way to help children understand fractions, decimals, money, and time problems.  These number line apps are some of my favorites.

Favorite Number Line Apps

Line 'em Up -This app gives kids an introduction into a number path. It gives them part of a number path started and then they have to finish it. Great for getting kids to understand the order of numbers and sets it up into a linear model so that kids can then understand a number line. FREE

Zoom - This app helps kids place numbers on a number line. They can Zoom in, to look at a small piece of the number line, or Zoom out to see an extended number line. FREE with paid upgrades

Both of these apps help students understand a number’s placement on a number line (fractions and negatives included). FREE

MathTappers: Number Line - This app is all about placing numbers on a number line.  There are lots of options in this app so that you can set the number size (whole numbers, decimals, negatives) as well as the tick marks that are shown, or not shown, on the number line. FREE

MathTappers: Estimate Fractions - Wanting kids to think about which benchmark number (0, 1/2, 1) a fraction is closest to?  This app does just that.  Kids have to estimate which benchmark the fractions are closest to and then place them on the number line by that benchmark number.  There are options of changing it to having the kids estimate the answers to addition and subtraction problems as well.  FREE

A fun way to work on estimating with fractions. When you are shown a problem you have to move the chicken’s nest near where the answer to the problem lies on a number line. If you don’t get their nest in the right area the eggs will break.  FREE

Online Tools for Number Lines

DreamBox is one of my favorite online programs, but if you can't afford to do a subscription to their site they still have wonderful online teacher tools that you can find here:
http://www.dreambox.com/teachertools

The tools on DreamBox that make use of the number line are:

Addition with Tens on a Number Line
Addition on the Number Line Using Landmark Numbers
Subtraction on the Number Line Using Constant Difference
Ordering Fractions on a Number Line
Integers on the Number Line
Equivalent Fractions on the Number Line

Conceptua Math is another of my favorite online programs, but they are also subscription based.  Just like DreamBox, they put some great tools online to help teachers who do not have a subscription.  Check them out at https://www.conceptuamath.com/app/tool-library.

Here are two of their tools that can help you address fractions on a number line:

Place Fractions on a Number Line
Estimate Fractions with Benchmarks

National Library of Virtual Manipulatives is a wonderful site that has a lot of online teaching tools.  Here are a few links to some of their tools that address number lines:

Number Line Arithmetic -  This virtual manipulative can help you model addition, subtraction, multiplication, and division on a number line.

Number Line Bounce - In this game, kids have to show the bounces along the number line in order to land at a specified number.

Number Line Bars - Uses bars and the number line to model addition, subtraction, multiplication, and division.  Nice way to help kids see the connection between the number line and bar model (or tape diagrams).

Number Line Bars: Fractions - Uses bars and the number line to model addition, subtraction, and division with fractions.  Nice way to help kids see the connection between the number line and bar model (or tape diagrams).

Place Value Number Line - Nice activity to help kids visualize large (billions) and small (decimals) numbers and all the numbers in between.

#### 1 comment:

1. Great post. This is very informative and effective article. I think its very very helpful for us. Thanks for your nice post.
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