Run by non-profit groups, the schools bring learning to girls whose families are forced to move around the region to survive. In Laisamis village, Marsabit County, at a school run by the Nairobi-based development charity Adeso, it is Lengima's turn to demonstrate what she has picked up from the morning session.
After playing around with some numbers on the chalkboard, she elicits cheers from the 59 other pupils in the class as she produces the answer with a double stroke. "Mathematics and Kiswahili are my favourite subjects," said Lengima. "I want to go into business in the future."
But circumstances are conspiring against her. Teachers have largely abandoned the area to escape sporadic attacks by Islamist militant group Al Shabaab. And increasingly erratic weather often pushes pastoralist families away from their settlements in search of water and grazing, limiting children's access to formal education.
Temperatures in Northern Kenya can reach over 30 degrees Celsius, and the region regularly suffers from both drought and heavy rainfall. Adeso works with the weather to give girls access to informal schooling which otherwise may have been impossible....