ASSET's efforts to improve teachers' use of assessment in the classroom have resulted in the development of two significant products—an assessment model that can be used with any science module (or unit) and the ASSET Performance-Based Assessment Framework. The framework has been developed for the STC program but can be applied to any curricular program.

The assessment model is completed by teachers who attend the Institute for Assessment (IFA). It enables them to apply the concepts from the works of prominent assessment experts such as Richard Stiggins, Wynne Harlan, and Grant Wiggins that are presented in the institute. The model can be used as the basis for assessing student learning and improving student attainment of knowledge, concepts and skills that are presented in the FOSS, Insights, SEPUP, STC and STC/MS curriculum materials.

The ASSET Performance-Based Assessment Framework was developed by groups of teachers who worked in grade-level teams. These teams used the "Understanding By Design" model developed by Grant Wiggins and Jay McTighe to complete the framework for every module in the STC program. It includes a method of assessing "enduring learnings" for each module, the criteria to be assessed, and the descriptors (rubrics) for doing the assessments.