Final answer:
There are five regional testing agencies in the US with their corresponding abbreviations: NWEA, NERBSS, SEDL, WASC, and SREB.
Step-by-step explanation:
The five regional testing agencies and their abbreviations in the US are:
- Northwest Evaluation Association (NWEA)
- North East Regional Board of School Studies (NERBSS)
- Southwest Educational Development Laboratory (SEDL)
- Western Association of Schools and Colleges (WASC)
- Southern Regional Education Board (SREB)
These agencies are responsible for administering standardized tests and providing assessment services to schools and educational institutions in their respective regions.