HARI SREENIVASAN:

But first: The number of deaths from opioid abuse continues to climb, topping 33,000 in 2015, according to the federal government.

One of the hardest-hit states is West Virginia, where the impact of the opioid problem can reach elementary schools. It's not the students who are using, but their parents. Grandparents, foster parents and the schools are figuring out how to cope for the youngest kids.

Special correspondent Lisa Stark with our partner Education Week traveled to Jackson County, West Virginia. It's the focus of our weekly education series, Making the Grade.

A warning to our viewers: Some of the scenes may be difficult to watch.