Based on learning trajectories synthesized from rational number reasoning literature, the DELTA project is designing diagnostic assessments for rational number reasoning (RNR). Central to this project is the creation of valid and reliable student-centered assessments that track students’ development over time in key mathematical areas of RNR. DELTA will then develop diagnostic tools that will provide teachers with instructional guidance, for both individual students and entire classes.

For more information, please visit gismo.fi.ncsu.edu/projects/delta/.