This book aims at evaluating the factors for poor performance of Mathematics in Ordinary level schools in Tanzania. Poor performance of Mathematics in Tanzania is a major problem especially in Secondary Schools. There are high rates of failures of this subject due to various reasons that eventually disorient student's education. This book shows all the challenges that lead to student's poor performance mathematics. The book also shows some ways of eradicating the problem so as to reach the Millennium Development Goals (MDGs).