Whitnall High School 5025 S 116th St, Greenfield, WI53228 Whitnall High School, home of the Falcons, has an annual attendance of about 950 students. Part of the Woodland…More Conference, the school serves students from parts of Greenfield and Franklin, as well as Hales Corners. In 2008, the average ACT score of Whitnall High School students was 23.2, above the state average of 22.3. The school hopes to achieve a 22.6 average composite ACT score by the end of the 2010-11 school year, and an average composite score of 24 by the end of the 2013-14 school year. Anthony Brazouski is the principal.