The Singers' Association of Kocourkov Teachers or the Kocourkov Teachers (Czech: Pěvecké sdružení učitelů kocourkovských (PSUK), Kocourkovští učitelé) were a Czech parody all-men's vocal group active during 1914–1959, with intermittent breaks, which enjoyed high popularity both in interwar Czechoslovakia and the Czechoslovak Socialist Republic, despite being frowned upon by the communist powers in the latter.
The singing group was formed in 1914 by gymnasium students from Rychnov nad Kněžnou for fun and they did some performing for a while, until World War I broke out.
After the war, they got together again and managed to be listed in the programme of the famous cabaret Červená sedma [cs] in Prague.
At the audition, nine "Kocourkov teachers" presented their act Balada na Váhu, a paraphrase of the work of Vítězslav Novák; however, Novák's version was a serenade about the Slovak river Váh, while the "teachers" sung about váha decimálka (decimal balance).
[4] After the demise of the cabaret due to lack of interest, the group broke up again, but in 1926, they resumed performing, lasting until the 1940s.