This story is a sequel to A simple test from the bureaucracy of Equestria
A divergent sequel to Evilhumour’s “A simple test from the bureaucracy of Equestria” following a different path than “Back to School for Lulu!” Rather than Luna having to undergo 12+ years of institutionalized education, Twilight points out that Luna and Celestia had essentially experienced the equivalent of having been homeschooled, meaning that technically Luna would only need a tutor for a year under the terms of the law as it is written.
Celestia, thinking that this is a wonderful idea (and not wanting to put her sister through the experience of being sent through 12+ years as the oldest remedial student in the history of History itself), seizes on the idea, congratulates Twilight for offering to be Luna’s tutor, and sends Luna to Ponyville to become Twilight Sparkle’s apprentice for the year.
Written with Evilhumour's permission (and encouragement), with Evilhumour and AnonEMouseJr acting as Beta Readers