This database was funded by a supplemental grant from the National Science Foundation in relation to NSF grant DRL #1222359. The four-year Description of Developing Principles for Mathematics Curriculum Design and Use in the Common Core Era [ERGO] project generated roughly 1000 data artifacts around teachers’ understanding and use of curriculum materials in relation to the Common Core State Standards for Mathematics (CCSSM).

The data from this project is set in the context of middle school mathematics in the United States in districts that were using the CCSSM as the official or intended curriculum at the time of the study.