This book provides the findings of a research conducted on the factors affecting the transition rates of learners from the primary to the secondary school level in Kenya. The rationale of the study is the fact that there are many children who are locked out of progressing to the next level in formal education despite the fact that the policy acknowledges that secondary education is part of basic education and therefore a fundamental right to every child in the country. A study on transition from one level of education to next is very important in this country bearing in mind that one, Kenya is a signatory to the international declarations that advocate for Education for All. Secondly, for the country to achieve Vision 2030 which is a new economic blueprint, education of the population will be a key allay. This book is a product of the author's masters degree thesis. It draws from data collected from one of the districts in the country which is densely populated and performs poorly in national examinations despite the fact that it is situated in an area favored well climatically.