ETS is a nonprofit education company that created and delivers some of the world’s most widely used tests. Its major exams include the GRE, TOEFL, TOEIC, and the Praxis for teacher certification. ETS also supports states and agencies with K–12 assessments and large research projects such as the NAEP. The organization delivers more than 50 million tests each year in over 180 countries and is known for its strong research base, extensive publications, and long-standing work in measurement science.