Online Game for Composing Numbers

Written by Donna Boucher

Donna has been a teacher, math instructional coach, interventionist, and curriculum coordinator. A frequent speaker at state and national conferences, she shares her love for math with a worldwide audience through her website, Math Coach’s Corner. Donna is also the co-author of Guided Math Workshop.

As we wind down to the end of the school year, I’ve been looking for ways to keep my students engaged while still ensuring that each lesson includes worthwhile learning. That’s the tricky balancing act, right? I recently stumbled across a wonderfully engaging and challenging game for composing numbers at, and it’s brought out the competitive streak in my students (and me…). The game is called Math Lines, and it allows students to practice composing any number from 5 to 12.

Math Lines 2

To begin the game, choose the number you want to add up to. With my 1st and 2nd graders, we’ve been using 10. With my Kinder babies, we have used 5.

The game features 3 levels of play, with each level becoming increasingly more challenging. All the levels feature the same goal, however–shoot the number in the middle to a number in the “line” that adds to the target number. When students correctly choose the number for composing 10, the ball pops and the line shortens. We played on the interactive whiteboard, and each student took a turn and then rotated to the end of the line. Students had to say the fact before tapping the number on the line.

Math Lines 3

I had our Friends of Ten poster hanging next to the interactive whiteboard so students could refer to it.

Friends of 10 Anchor

I will confess that my only class to conquer Level 3 was my second group of Kinder babies, and they may have had some assistance. 🙂

Like all ABCya! games, this one is totally free! I’d love to hear about your experiences with it! BTW, there is also a multiplication version.



  1. Lori Breyfogle

    I LOVE you Math Lines. My students play it through the Cool Math Games website. I am going to go to ABCya and try out their version. I am curious if they are the same or if one is more difficult than the other. Do you know if the ABCya version is iPad friendly?

    • Donna Boucher

      Not iPad friendly, Lori, because it requires Flash. ABCya does have some apps, but Math Lines is not one of them. 🙁


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