Now you have a whole bunch of long strip sandwiches that need to be cut into usable bites.  Cut each strip into 2 1/2 inch pieces like this:

With right sides together, pin and sew two pieces together. Use as many pins as you need on either side of the seams to keep them nice and neat! 

Note the vertical seams on the top and bottom strips - see how they are facing different directions?  This makes them lay flat as you sew the horizontal seam.

After pressing the horizontal seam, pin and sew another strip to create a square.  

Repeat this process with remaining strips.  Then, step back and admire your stack of checkerboards! -- Jen