For anyone who's caring for school-age children, I want to let you know that nearly every single online education platform/tool is currently offering up their normally premium paid services for free on account of school closures. While some will offer these directly to parents/students, most of them require a teacher to sign up and then have the student account exist underneath them.
If there is a resource that you or your children would like to access, please email your child's teacher and ask if they'll sign up for it. It'll likely take only two minutes on their end (and they'll be happy to do it! trust me!), but it'll open up a ton of resources for you and your child.