Parents watching what their kids were learning (or not learning) was probably the largest acceleration into home and alternate school in history. That's what happened to nearly every family in our home school co-op.
Funny you should mention that, we're currently looking for a home school co-op in our area. It has become apparent that my child has learned basically no analytical skills whatsoever so I'm planning on homeschooling for a year to see what improvements that makes before making a final decision about what to do for high school.