the service is called eneza. students can do a quiz on a syllabus and get feedback. they can access an encyclopedia and get help from a teacher. it has had the biggest response in rural kenya. the team behind the service is constantly looking for ways to make it better. the co-founder is 25-year-old who says he feels overwhelmed by the company's success in just a few years. >> the studying can get pretty boring. as most know. to hear that kids are hiding under their blankets and studying all night or developing and seeing students studying at 2:30 in the morning. that's pretty cool. >> these students attend school in nairobi's largest slum. it's thanks to ngos that it has access to these mobile phones. >> i see a trend especially in science subjects, personally it has improved the grades of the students. >> education analysts say that huge potential in the innovation like eneza. >> if proper train something provided, if all grades have increased there would be a real benefit to reap from the use of mobile phones as a teaching tool. >> they plan to reach millions of s