CIES 2018 Presentation, given by Ben Piper. The Kenyan Ministry of Education (MoE) in collaboration with RTI International and the county Governments of Laikipia, Nairobi, Siaya and Uasin Gishu have been piloting the Tayari Early Childhood Development and Education (ECDE) model since 2014. Built on a Randomized Controlled Trial (RCT), RTI has been tracking a cohort of learners from both treatment 2 and control schools over the last two years: The baseline data was collected in January 2016; midline in October 2016, at the end of the academic school year; and endline a year later in October 2017. The overall effect of Tayari showed a larger effect at midline – after ten months of implementation – than was expected at end line, i.e. after two years of implementation. The gains in the Tayari group was about 50% higher than in the control group.