As of September 2014, a number of websites for public schools include answer keys to Sunshine Math worksheets for various grade levels. Two schools that provide the answer keys online include Sanders Corner Elementary School and Franklin Elementary School.
The website for Franklin Elementary School has answer keys available for Sunshine Math worksheets for kindergarten through fifth grade. The Sanders Corner Elementary School website has answer keys available for kindergarten through eighth grade. The Sunshine Math worksheets feature different planet and dwarf planet names for each grade level, starting with Mercury for kindergarten, Venus for first grade and ending with Pluto for eighth grade.