Given that so much of modern education happens in large-group settings, it seems hard to apply SRS principles to it. A group of students will be a lot farther from 100% recall of all items than any individual student might be, and the items that require review will correspondingly differ.
Spaced repetition could replace time currently wasted on homework. As a kid I would have much preferred to sit in front of Anki instead of being laden with hours of homework, and it probably would have done me more good over the long term.
