The cost of an ABC book in the Central African language Sango is about 50 CZK. Thus one kilometer is one ABC book for three children in one desk.
Time will not be measured. SIRIRI has been operating in the Central African Republic for more than 13 years. Work in this developing country is a long-distance run - speed is not important. Endurance is.
You will find more informations about the program here: https://siriri.org/en/learning-through-play-in-central-african-republic/