Since the easyCBM© learning system was first published in 2006, over $8 million of federal funding (both from the Office of Special Education Programs and more recently from the Institute of Education Sciences) has been used to develop, study, and refine the assessments available on the system. This Technical Manual summarizes the ongoing research that is the foundation of the easyCBM© assessments in reading, mathematics, and Spanish literacy. It addresses the need for a single document that summarizes the results of all previously published technical reports, highlighting the key findings from each. For ease of access, the Technical Manual is organized by chapter, with Chapter 2 providing information on the analytic procedures referenced in subsequent chapters, and each measure discussed in its own chapter, beginning with the Reading measures, then moving on to the Mathematics measures, and finally ending with the Spanish literacy measures. (Individual chapters contain references.)