I would get a copy write new originals on it and void the signatures return to them with a Notice of Mistake and waive the benefits let them off the hook for liability...they aren't worried that your children aren't learning, they are worried they will be held liable ?
Printed copy · Anthology Volume 9, page 179Printed copy from The Tender For Law Anthology, Volume 9, page 179 (printed 13 June 2014). Added by this site; not part of the Facebook export.