New Delhi, April 4 -- Valarie Wairimu has no time to rest during break time at Kenya's Greenland Girls School. The teenager grabs a snack and goes straight to what makes this school unique: its nursery.

The 19-year-old is met by a team of nannies who have been watching her baby, Kayden, before she feeds him between classes.

The school is the only educational institute in Kenya dedicated to teenage mothers and cares for many of their children. For its 310 students and more than 80 children from infants to toddlers, Greenland represents a second chance at school that is free from stigma and, experts say, a model for how young mothers can be reintegrated into education.

"When I found that I was pregnant, I didn't have anywhere else to go,...