The competition is open to all students in grades 5 through 12 at the partner schools: Georgi Benkovski Primary School in the village of Mirkovo, Hristo Yasenov Secondary School, Hristo Botev Primary School and Todor Peev Vocational High School in the town of Etropole, St. Paisiy Hilendarski High School and Agro-Technical Vocational High School in the town of Zlatitsa, Ss Cyril and Methodius Primary School in the village of Chavdar, Ss Cyril and Methodius Primary School in the village of Chelopech, Vocational School of Mechanical and Electrical Engineering in the town of Pirdop, Savo Savov High School in the town of Pirdop, Nikola Dimov Vocational School of Tourism and Food Technology in the town of Pirdop, and Lyuben Karavelov Secondary School in the town of Koprivshtitsa.