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Address: 5815 NE 48th St, Kansas City, MO 64119 , Business Hours: 7:43 a.m. - 2:40 p.m. , Winnetonka High School is a school in the North Kansas City School District, run by Principal Eric Johnson. The school was established in 1970 and has celebrated 50 years of excellence in educating and preparing teenagers for the world beyond high school. Winnetonka High School principal Johnson..