The Estonian time was a prosperous time for the school. During that era new principles, symbols and traditions were introduced to the Secondary School of Science.
In 1921 the school cap was designed by art teacher R. Nyman, that is used until today. Six years later in 1927 the “Boy” monument was erected in honour of the students and teachers who had lost their lives in the Independence War. In 1939. Ilmar Mikiver wrote the lyrics for the anthem of the Secondary School of Science.
The legendary teachers of the period were headmaster Nikolai Kann; the eccentric physics and mathematics teacher Paul “Pudi” Ederberg and the school inspector Ernst “Beard” Peterson Särgava, to whom such traditions as pudirida (Pudi’s line) and the “Sermon on the Mount” are tributed.
In addition to academic activities, music was very popular among the students of the Secondary School of Science: the wind ensemble founded in 1919 already became the best in Tallinn in 1925. Also volleyball and basketball were enthusiastically played by the students. There were great achievements in both disciplines and the school’s volleyball team even managed to keep the champion’s title for 13 years in a row.