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Photo Gallery | Five-Star Principals Race for Education

Principals of schools that achieved five-star rankings in the Clark County School District's School Performance Framework were recognized at an event at the Las Vegas Mini Gran Prix on Thursday morning.

The framework, or SPF, attempts to measure schools from throughout the large district on equal footing. This is the second year the SPF has been used in lieu of only the Adequate Yearly Progress measure, the lone metric in the federal No Child Left Behind law.