For this star, you will need 8 squares, all the same size.
Fold the squares corner to corner so they have creases that look like this.
Fold two of the corners so the points are touching in the center. Make sure they are lined up, you don't want a crooked checkerboard!

Then fold the top toward the middle as seen below.
Glue together as usual. Refer to BASIC STAR for this part. All done!