“Ineffective” school usually means school that is ineffective for learning, but I think school that is ineffective for learning can be effective in other ways, for example effective in providing daycare services to parents.
In that case, I think an effective thing to do is to plan transition from existing schools to daycare centers, eliminating teaching and focusing on caring. One could destroy all schools and build daycare centers instead, and destroying all schools has emotional appeal to me, but transitioning is probably cheaper.
I agree strategic coal reserve sounds promising, especially for being aligned with coal miners.
One reason to prefer buying coal mines to mined coal is that mines can act as storage. How much does it cost to store coal? Pile of coal sounds like a fire hazard, for example.