Complex sentence: Secondary school education in Schreiber was started in 1924 when provincial approval was received to commence the Schreiber Continuation School and subsequently a four room annex was added to the existing Schreiber Public School.
Split into simpler sentences: Secondary school education in Schreiber was started in 1924 when provincial approval was received to commence the Schreiber Continuation School. Subsequently a four room annex was added to the existing Schreiber Public School.