You could also fold down a cardboard box and use it as a "bolt roller". Or ask the fabric shop if they have an extra bolt board that you can have.

I agree with rolling them. I use the pool noodles and cut them to size. I also use them when I buy stabilizer by the yard. When starching, spray and wait few seconds until all of it is absorbed into the fabric and then you won't get the white residue on the fabric. Good luck with your class.