Algebra tiles are a great way to make an abstract concept like Algebra, visual. You will be amazed at the difference this tool will make for students. Today I will first explain what the tiles represent. Then, over the next few days I will be posting some lessons you can do using the Algebra Tiles. The Algebra tiles I use can be purchased “>here, or you can download a free version here.
The small squares represent units. The yellow side means to add and the red side means to subtract (or add a negative). Therefore, to represent adding 5, I would use 5 yellow tiles.
To represent subtracting 3, I would use three red tiles.
The long tiles represent an unknown quantity, your variable. The green side is for positive variables and the red side is for negative variables. Therefore, to represent 3n, I would use three of the long green tiles.
To represent subtracting 2y or -2y, I would use two long red tiles.
Last, are the large square tiles. These represent your variable squared, n². Just like when using an area model to understand multiplication, you can see that n x n = n², our large square.
So, to represent 2w² you would use two large blue squares.
To represent subtracting g², or-g² you would use one large red square.
This is what the expression n² + 4n – 5 would look like.
Have your students practice representing simple expressions with the tiles so they fully understand how they work before moving forward with another lesson.
Comment below if you have used algebra tiles in your classroom or if you have any questions!