If there is a school name or letters, I would start with that and then use the school colors. If there is a mascot or other school item, like an Indian or a tiger, maybe you could shape something out to put on the back of the pillow. I would use the school name in the middle, cut strips in the colors and make it maybe 16" square or more. If there are color strips down the legs, use them too. Open the arms and legs at the inner seams, you will find a lot of fabric when it is opened up. If it is wool, they have probably been dry cleaned many times over the years so the wool would have already been shrunk. Sew it just like cotton but I would serge the edges. You should be careful with the lining. I would not use it if there are rips and holes in it. If good, use it for an inside pillow case if you are providing the pillow form or if you are making the case and putting poly fill in. Best of luck. I was a cheerleader, Class of 1960, and I would love to have my uniform.