By the late 1950s, Kozy was included in the scheme to erect “a thousand schools to mark a thousand years of the Polish State”. As part of the National School Construction Committee, the Provincial Union of Municipal Co-operatives “Samopomoc Chłopska” in Katowice became the founder of the school. The construction works began in the spring of 1960, and the new school was ready to use in November 1962. The school was officially opened by Edward Gierek, the First Secretary of the Polish United Workers’ Party. The total construction cost of amounted to 8 million złoty. At the same time, a two-storey teachers’ house was built next to the school. The new school had 11 classrooms, a physics and chemistry laboratory, a biology laboratory, a gymnasium, an assembly hall, 2 practical and technical workshops, a common room, accommodation for the headmaster and the caretaker. The school is named after Stanisław Staszic, a leading figure in the Polish Enlightenment. In 1989, an obelisk was unveiled in front of the building to mark the 50th anniversary of the outbreak of the Second World War, and commemorate the citizens of Kozy who died fighting against the Nazi occupier in 1939-1945. The educational reform in 1999 led to the creation of the new John Paul II Middle School which was located in the extension on the north side of the building of Primary School no. 2. Eventually, the Middle School was liquidated as a result of another reform in 2017. Consequently, the Secondary School was moved from the building of the Primary School no. 1 to the part of the other building previously occupied by the Middle School.