Photo #2 shows the assembly of the rag quilt square sandwich. The red back piece is flannel side down. The batting or middle piece is centered on the back piece. The plaid top piece is aligned to the red back piece, flannel side up.
Pin the sandwich together and sew through the sandwich corner to corner. Start and stop your stitch line about 3/4 to 1 inch from the corners of the square. Out of habit, I lock the stitches in with a few back stitches. Photo #3 shows the finished rag quilt square.
Some tips: If this is your first time at making a quilt square, take your time. Relax, this is not a race against the clock nor a race against the cold weather. This is supposed to be fun, hopefully not a necessity like it might have been with great grand paw.