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Hispanic activists, advocates and elected officials protested a proposed Mexican-American studies textbook on Tuesday ahead of the Texas Board of Education's first public hearing on the text. Photo by Martin do Nascimento for The Texas Tribune.

Hispanic activists, advocates and elected officials protested a proposed Mexican-American studies textbook on Tuesday ahead of the Texas Board of Education’s first public hearing on the text. Photo by Martin do Nascimento for The Texas Tribune.

Hispanic activists, advocates and elected officials protested a proposed Mexican-American studies textbook on Tuesday ahead of the Texas Board of Education’s first public hearing on the text. Photo by Martin do Nascimento for The Texas Tribune.