In the first three years of a child's life, 85% of its brain develops. Everything during that time, from diet to speech skills and socialization, affects a child’s ability to be ready –or not -- for Kindergarten two years later. Kindergarten readiness can be an indicator of how well a child will do in the ensuing school years. And there’s a clear domino effect: When children are not developmentally ready for Kindergarten, they often struggle to read by third grade. And those who don’t read well by the end of third grade are less likely to graduate from high school than their friends who do.