Akin Alston, founder and master teacher at Engageable Designs, will be the guest speaker at the Rotary Club of Mercer Island’s online meeting at 1 p.m. Sept. 29.

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“Alston is well known to have an innovative, charismatic and unconventional approach to mathematics teaching and learning. He is constantly developing new community based initiatives and services to support higher mathematics achievement in communities of color,” according to the Rotary website.