Grand Rapids Public Schools said in a statement Wednesday that the weapon was discovered this morning at Stocking Elementary School and that it was the fourth time this year that the district has uncovered a student with a handgun—three of them in backpacks.

At Rancocas Valley Regional High School, something is always watching. It goes beyond the hundreds of security cameras Dr. Christopher Heilig, the superintendent, pointed out as he walked around the sprawling campus.

The issue has prompted new legislation in New Jersey ordering districts to take the needs of students into account, amid tales of children left at the top of staircases or told to hide on their own.

It would take a teacher 30 years to save for a 20% down payment for a "median home" in San Francisco Unified School District in California, according to a new analysis breaking down some of the most—and least—affordable districts for teachers.