The US Agency for International Development (USAID) Early Grade Reading Project (EGR) cooperated closely with the Ministry of Education and Higher Education (MOEHE) to provide each student in EGR classrooms with age- and grade-level appropriate reading materials. In March 2018 EGR formed the Materials Development Technical Working Group (TWG) comprised of 10 members from four MOEHE General Directorates: General Education – Kindergarten (KG), Supervision and Educational Qualifications; National Institute of Education and Training (NIET); and Information Technology. The TWG methodically progressed through many stages before the complementary reading materials reached the classrooms: developing a book leveling instrument, inventorying the available books in the schools and in the market, leveling the available books, identifying the gaps, and finally developing and/or purchasing needed reading materials. By project end, EGR had developed or procured over 100,000 titles of leveled readers, decodable readers, big books, and read-aloud books to provide the 104 schools that EGR supports with complementary reading materials for KG-Grade 2 classrooms. EGR, in coordination with a TWG from the MOEHE, developed criteria to determine the grade-level appropriateness of the complementary reading materials. EGR considered two factors in determining a book’s appropriateness: level and readability. Both leveling and readability are necessary for determining the texts that students should be reading.