I know not everyone adds the Bible to their school curriculum, but for those who do, here is an option for your high school or college age students (or you!): Grace Notes: Diploma in Bible Teaching.
Grace Notes offers training in Biblical Studies. The curriculum is 100% free and you can look at many of the lessons online. Your student will complete a lesson, complete a quiz, send the completed quiz to Grace Notes, and thus obtain access to the next lesson and eventually earn a diploma.
For more information on why Grace Notes is free, how to obtain a degree, and how to complete the courses, go to this informative page.
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