Algebra tiles (tacitle)

A tactile version of algebra tiles. The small yellow squares represent 1, the green rectangles represent x and the large blue squares represent x^2.
The reverse with black raised lines is the negative.
Can be used

as manipulatives to solve basic equations.
to demonstrate expansion using the area method.
to demonstrate factorisation using the area method.
to demonstrate completing the square
For a kit print 4 x^2 tiles, 12 x tiles and 20 ones.