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Specifically , the students defined central themes ; selected , researched , organized and wrote the exhibition catalog ; helped museum staff with the installation ; designed educational materials ; developed an interactive computer program and educational kiosk - - in short , coordinated aspects of the exhibition . Writing in the exhibition catalog , Proeung Chhieng , the vice rector at Phnom Penh 's Royal University of Fine Arts , said the dance was a tradition with a precise choreographic language that " excludes any improvisation or variation .