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School on Wheels of Massachusetts will hold its first annual Wiffleball Tournament on Saturday to support the education of homeless children. The nonprofit agency provides academic support, one-on-one tutoring, and school supplies and backpacks to homeless children in Brockton, Stoughton, New Bedford, and Norwell. Teams consist of two or three players at a cost of $50, and there will be fast-pitch and slow-pitch divisions. There is also a home run derby for an additional $10 per batter. Rain date for the event to be held at the EYBL baseball complex off Lincoln Street in Easton will be next Sunday. More information about School on Wheels can be found at www.sowma.org.