WASHINGTON, Dec. 18 -- Rep. Chellie Pingree, D-Maine, issued the following news release: Maine First District Congresswoman Chellie Pingree today announced the winner of the 2023 Congressional App Challenge for her district: Scarborough High School junior Matthew Fagerlund. Matthew's app "GiRAPHER" teaches middle school and high school students how to graph the equations they are likely to encounter in their math classes. "Each year, the Congressional App Challenge gives Maine students the op more PR