# Online Game for Composing Numbers

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 ABCya.com, 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.

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. But you can choose any number from 5 to 12 as the target number.

The game features 3 levels of play, with each level becoming increasingly more challenging. All the levels feature the same goal, howeverโshoot the number in the middle to a number in the “line” that adds to the target number. In the example shown below, the ball in the middle is a 3, so you want to click the 7 because 3 and 7 make 10.

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.

Check out this video to see it in action!

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

I will confess that my only class to conquer Level 3 was my second group of Kinder babies, and theyย may have had some assistance. ๐

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.