Step by step easy quilt 100 7-1/2"X 3-1/2" rectangles from the print fabrics and 100 3-1/2" X 3-1/2" squares from your neutral fabric.
Grace and Favour blog. Scroll down to get to this block--just pictures, no tutorial--but look at the other pretty blocks she has.
Magnolia Bay Quilts: String Blocks Tutorial
This is an awesome star block.
Jelly roll tutorial
Jelly roll idea!
Technique for a prperfect Square-in-a-Square block - includes measurement chart for different sizes *
Easy way to sew a square within a square or "exploding square"