More than 60 women and girls who had been abducted by the extremist group reportedly escaped after their captors left for a raid. More than 200 schoolgirls taken in April remain missing.
Lots of kids spend part of their vacation at summer school, but there is very little information about what works.
People flying to the U.S. on international flights might want to keep their phones and other electronic devices charged. The devices might not be allowed onboard if they can't power up.