BLEND IT LIKE KHAN--the sequel: Looks like the team at Envision Academy in Oakland is blending the right ingredients. Following its much heralded blended learning project this summer, Envision has been selected by Khan Academy as part of a pilot group. Khan's team has been coy about saying just how many schools are piloting the website this autumn. EdSurge has heard about projects at several Summit and KIPP charter schools, Los Altos public schools, and independent schools including Eastside College Preparatory. Khan is using these pilots to define best practices and figure out what exemplifies a Khan Academy classroom. Expect more details as the pilots progress into early 2012.