Education Lab is a Seattle Times project that spotlights promising approaches to persistent challenges in public education. The Seattle Foundation serves as the fiscal sponsor for Education Lab, which is supported by grants from the Gates Foundation and Ballmer Group. Learn more about Ed Lab and subscribe to our weekly newsletter . Monday marked Ben Shuldiner’s 100th day as Seattle Public Schools’ new superintendent.  At times he’s charmed educators and parents with his easygoing demeanor, candor and willingness to speak bluntly about longstanding challenges facing the district. But some educators and parents are still skeptical about whether an outsider with bold plans could fully understand Seattle’s racial dynamics and the district’s history.  From the moment he was announced as the new superintendent, Shuldiner pledged to make Seattle the country’s single greatest urban school district.…