World in Progress: Nigeria's mobile teachers vs. Boko Haram

People in northeast Nigeria have been suffering under attacks by Boko Haram for over 10 years now. Around 20,000 people were killed and some 2 million people had to flee their homes. The terror group especially targets young women — they are kidnapped from schools and then forced to marry the group's fighters. Udo Schmidt met up with teachers who defy Boko Haram and teach despite all odds.