I’ll let Politico explain:

The [Obama] administration pumped $3 billion of economic stimulus money into the School Improvement Grants program. Six years later, the program has failed to produce the dramatic results the administration had hoped to achieve. About two thirds of SIG schools nationwide made modest or no gains — not much different from similarly bad schools that got no money at all. About a third of the schools actually got worse.

The SIG program was created in the final year of the George W. Bush presidency.  All told, the U.S. Department of Education poured around $7 billion into the program.

Since 2010, North Carolina public schools received tens of millions of SIG program dollars.  The state received nearly $40 million in SIG grants in 2016 alone.