A new study has given ninth graders in Germany bad marks in math, science and reading comprehension. Education experts have blamed a shortage of teachers — a problem that's only going to get worse.

SCHMITZ: Crowded classrooms, a lack of teachers and an increasing number of students whose native language is not German are at the heart of the problem for teachers here, says 36-year-old Mohr.

The understaffing in Germany's primary schools could soon be over as low childbirth rates create an oversupply of teachers, a new study has predicted.