31Dec
ACSL 2026-27: Online Computer Science League for School Teams, Four Contests until May 2027
For school students from elementary to senior grades: teams are registered by schools, organizations and local groups from different countries. The American Computer Science League (ACSL) holds four online contests on the HackerRank platform: the first opens on 19 October 2026, and the contests close on 10 January, 28 February, 11 April and 23 May 2027; top participants are invited to an online final on 29 May 2027. Teams register by 31 December 2026, and the fee is $175 per team ($125 in the elementary division).
Olympiads Online