Where did they go? Kids missing from public schools

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There's no question that homeschooling has increased but that's not what the original article is about.  Kids that are being homeschooled are still registered students and their progress is tracked.  This article is referring to kids who are neither in school nor registered as homeschool students.  These are kids, of all ages, who are simply not getting an education of any sort.  It's bad for everyone., especially the kids.