Ressu Upper Secondary School (Finnish: Ressun lukio) is a school located in central Helsinki, Finland. Founded in 1891, Ressu is one of the oldest Finnish speaking schools and considered to be one of the most prestigious schools in Finland. Ressu is one of the most difficult upper secondary schools to gain entry to in Finland, with admission typically requiring grade point averages above 9.3 on the Finnish scale of 4.0 (the lowest) to 10.0 (the highest). Students in Ressu have a reputation of moving onto illustrious careers in further education, in a range of top universities both in Finland and abroad. The current principal is Ari Huovinen from Helsinki.