It sounds like it does, on the surface, but lesson plans are something teachers currently trade, sell, and use as a basic resource. The difference between a just-graduated teacher and a teacher with ten years of experience is that the teacher with experience has a stack of lesson plans, and can swap out which ones they use on any given day based on the progress, skill, and mood of their students. And, let's not forget, all of this is being created in the teacher's own time, outside of school hours.
Oh, and I doubt the school district will be making these available for free to their own teachers. (Unlike the teachers themselves, who might share with a co-worker.)
Any teacher who's spent any amount of time working on their own lesson plans would immediately start looking for a job outside the county. Any teacher who's any good wouldn't take a job in that county. You'll have beginner teachers who don't know any better, or teachers who've been there for ages and don't want to move, who'll just be hanging out until retirement. (And not updating any of their lesson plans.) Oh, and teachers who buy all of their lesson plans, because they can't be bothered to come up with them themselves. And the beginners will probably leave as quick as possible.
So you're trying for high-turnover, and chasing out any teacher who wants to invest their own time and effort into teaching the kids. Which means you'll get low-quality teaching, and low-quality schools.