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# Open Number Line

## Collection by Sheila Sikes

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addition color by number by michelle.mullis on Indulgy.com

We are up to our elbows in addition AND subtraction. According to the new Common Core Standards the traditional algorithm is a fourth grade standard (CCSS.Math.Content.4.NBT.B.4 Fluently add and subtract multi-digit whole numbers using the standard algorithm.). We wanted to make sure we offered students SEVERAL strategies for addition and subtraction so that the algorithm actually makes SENSE rather than becomes a

I love having a theme and focus! Recently I’ve written several posts about number talks and mental strategies for computation. Check out Adding on a 120 Chart, Exploring Addition Strategies, […]

Open number lines are great tools for multi-digit addition! Grab a FREE activity you can use in your classroom!

Did anyone else catch the tiny mistake in the Pirate Addition pack? Thank you, Carin, for pointing it out! I'm such a perfectionist so I cannot believe I would post something with a mistake for the whole wide web to see. Alas, you can grab the edited version right here! It was a whirlwind of a week with only 3 days of school and so much to cram in! I was working on my math work stations a bit this week and made a new I Can Chart for ten frame fun. You can grab the I Can Chart, ten frame, and…

It seems we have started back to school a good bit earlier than many of the rest of you, so I thought I might share our initial experiences teaching our first math unit after adopting the Common Core. It may make it a bit easier to see the anchor charts we created. I hope this proves helpful. According to the Common Core, there is an emphasis on building number sense with third graders. Our first unit has included Addition and Subtraction. To build number sense, we have taught several…

Open number lines are great tools for multi-digit addition! Grab a FREE activity you can use in your classroom!

Technology is a great way to engage students in learning. These FREE number sense tools help students develop deep understanding of numbers.

Open number lines are great tools for multi-digit addition! Grab a FREE activity you can use in your classroom!

Open number lines are great tools for multi-digit addition! Grab a FREE activity you can use in your classroom!

Shortly after I made my Addition Strategies pack, I knew that subtraction would follow soon. I mean, we all need a little help with that tricky minus sign, right?! Well, it only took me a year to mark this ditty off of my to-do list. Life just sometimes gets in the way, ya know?! But, alas, it's finally done and I *may* be ready to tackle subtraction this year (after I finish thoroughly enjoying my summer vacation that is!) I actually had a lot of fun creating this little guy because I was…

Students need to understand why we estimate numbers and have a common-sense method for rounding numbers. Grab a FREE resource!

Get your students up and moving this fall to practice adding double digit numbers by adding on an open number line. Clipart courtesy of Melonheadz Illustrating...

I'm on a mission to help your students feel successful and engaged. Your entire classroom can be transformed using simple principals of student engagement.

We are teaching several common core strategies to our third graders this year to help them add and subtract. One of those strategies is using an Open Number Line. This math has definately been challenging as we attempt to stay one step ahead of our students. With no text books and little practice material, we are creating our own. Here is a homework sheet we used to check student understanding after our whole group instruction. (Clipart from 3am Teacher). For a full packet of "How-To's" to…

There is very little printed material to direct parents to, when they ask how you are teaching their children to add and subtract with this "NEW MATH" (common core strategies). Set their minds at ease by handing them these "how-to" parent guides. These guide provide step-by-step instructions for t...