Good for you!!! It's a great way to keep accurate points.
Just a word of advice - there IS a difference between "foundation" piecing and "paper" piecing. Foundation piecing is where you sew the patches onto a fabric background, and the background is left permanently in the quilt. Paper piecing is where you sew the patches onto a paper background, and when it's completed the paper is torn away. I make this distinction because I have a friend purchased a product labeled "foundation piecing sheets", thinking it was the tear-away kind of paper. She was quite upset when she realized (after making several blocks) that the foundation she'd used was NOT tear-able - it was the kind designed to be left in the quilt.
Hope this helps!