Most of today's students and their parents are used to report cards based on the letters A through F. But a new grading system is taking root in schools across the country. It's called standards-based grading. The point is to give parents more information, as New Hampshire Public Radio's Sam Evans-Brown reports.
SAM EVANS-BROWN, BYLINE: Here's what we know about grades in America: A is good, F is bad. But what about these?
Many states want to increase the amount of electricity that comes from wind and solar energy. One challenge is that renewables are not reliable. The wind doesn't always blow, the sun doesn't always shine. So companies are now trying to develop better ways to store energy.
New Hampshire Public Radio's Sam Evans-Brown reports on a company that is working on a storage system that uses compressed air.