NWEA is a research-based, not-for-profit organization that supports students and educators worldwide by creating assessment s ... olutions that precisely measure growth and proficiency—and provide insights to help tailor instruction. For 40 years, NWEA has developed pre-K–12 assessments and professional learning offerings to help advance all students along their optimal learning paths. Our tools are trusted by educators in 140 countries and more than half the schools in the US. read more