Jaroslav Kozlík, Czech volleyball player and educator (b. 1907)
Jaroslav Kozlík (22 May 1907 – 21 October 2012) was a Czech educator and theorist of education, a senior member of the Sokol movement, a pioneer and a former volleyball champion in Czechoslovakia. He was the author of 30 books and over 300 articles, mostly devoted to the theory of education and sports organizations. Kozlík developed the concept of physical education for elementary schools in the Czech Republic and Slovakia. In 2009, he was named an honorary citizen of Prague 4, the largest city district of Prague. Until his death, Kozlík was active in the Sokol organization, criticizing its current administration for a lack of edificatory impingement on society and youth.