We are a small church with a small Sunday school that spans age 3 to grade 10, which makes Sunday school challenging at the best of times. I have been sending out lesson plans via email to everyone who has ever been connected to our congregation in any way, as well as Sunday school contacts with other congregations in the area. I have been making extensive use of the pre-rotation materials we have (curriculum going back to the late 90s) as well as material on this site to create lessons with material for everyone. I am scanning a number of the reproducible pages to include.
I am also starting to include material that is deliberately designed to hit some of the public school objectives, to help out parents who now need to home school kids while working from home (schools will be closed for the rest of the year here.) This includes writing projects that connect to the story (e.g. newspaper stories for Holy Week) and making games or activities into science or math-based lessons (e.g. growing a seed as a sign of rebirth includes suggested research about plant biology and an experiment about growing different types of seeds).
Much of this will not be as pertinent post-COVID 19, but it would still apply to a student who needed to stay home for an extended period of time due to illness.