The Algebra Project DR K-12, funded by the National Science Foundation as a Research and Development Project, addressed the challenge of offering significant STEM content for students to ensure public literacy and workforce readiness. The project's primary purpose was to test the feasibility and effectiveness of a model for establishing four-year cohorts of low performing 9th graders learning accelerated mathematics with the goal of being college-ready at the end of high school. Students would: (1) Complete four years of accelerated high school math, pass high school graduation tests, and meet college entrance requirements; (2) Be accepted to college, and place into non-remedial math courses as freshmen; and (3) Develop more positive attitudes towards--and be more confident in--mathematics, and begin to demand math literacy for themselves. [For the document appendices: (1) Representation of Demonstration Sites by Year; and (2) Profiles of the Four Cohort Demonstration Sites, please see http://inverness-research.org/reports/2014-04_Rpt-AP-Cohort-AppendicesEvalRpt_01-2014.pdf]