Once I finished making all 30 blocks, it was time to assemble the quilt top!
First, lay out all the blocks and choose what order you want to sew them in. I wanted to alternate blues and greens but I also wanted to have the inner blocks and outer blocks relate to each other. So if you start at the top left of my layout, see how the inner block is dark blue and then the square to the right uses that same fabric for the outer square? that continues all the way across the row and then at the last square it moves down, then left across the second row...continuing all the way to the bottom of the quilt. I'm pretty surprised it worked out since I didn't plan it that way. The only thing I wasn't thrilled with was that there are two green polka dot squares touching each other on a diagonal. If I wasn't trying to match up the inners/outers I wouldn't have put two of the same blocks so close together.
Next, sew a piece of 1.5" x 11" sashing between each block in a row. I recommend leaving the strips a little longer and then trimming after you sew. It wastes a tiny bit more fabric but that way if the piece stretches or skews at all, it still ends up ok.
Then sew a long piece of sashing between each row. If you want a border, go ahead and sew on a border at this time too. And there you have it - a completed quilt top, ready to be put on the frame and quilted!