After putting students' names on the tabs of file folders, I glue these pages on the front and back. As students finish their work and I've reviewed it, I put the papers in the folders (or a parent/student can help with that too). I've also used large manila envelopes for FFs.
For years, I left the back side blank, but have found in recent years that stamping Friday's date next to where it should be signed helps parents understand better where to sign.
Feel free to send questions my way.