Kevin Costello is a math teacher at Northgate High School located in Walnut Creek, California and part of Mt. Diablo Unified School District. Kevin Costello has yet to be rated on RateMyTeachers.com. Northgate High School ranks 1,360 in California. Additionally, the average teacher rating at Northgate High School is 4.0 stars. Be the first to leave a review by clicking here.
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