"We need a conducive environment to proceed with our exams," said O-level pupil Ben Ogada, who sits for his final pre-university examinations in December. "The government`s threats are disrupting our learning process."
His Korogocho Glory School, built 15 years ago just off the banks of Nairobi River, faces demolition when authorities set in to clean up the river, heavily polluted by an adjacent dumpsite.
London-based rights watchdog Amnesty International is warning that 127 000 people risk forced eviction when the clean-up begins.
School authorities say more than half of the 500 pupils will be affected by the plan.
Even primary schoolchildren are worrying.
"I am not happy that our school might be closed. I want to be a pilot when I finish school but how can I do that if the school is closed," said 11-year-old Silas Wondera.
The eviction loomed as Amnesty International rolled out its global "campaign to demand dignity" in Nairobi`s Korogocho slum settlement.
Under the campaign, slum dwellers are petitioning Kenyan authorities to make better their plight through a free cellphone texting service.
"Forced eviction is very widespread throughout Africa," said Amesty`s secretary general, Irene Khan.
More than six million people have been forcibly removed from their land and homes in recent years in several African countries, including Angola, Nigeria and Kenya.
"Very often it`s often seen by government as an inevitable consequence of economic growth. But we are saying that the poor don`t have to pay the heaviest price for economic growth were governments to plan," she said.
She said "people who live in slums face human rights violations that stop them from improving their lives in the slums as well as to improve their lives to get out of the slums".
Nearly half of Nairobi`s four million people live in slums lacking basic services and live in "constant fear of hara