А prominent class is held In Stage 4 today on November 18th in 2014. Primary education teacher Aleksandra Aprcovic and professor of chemistry Katarina Roganovic allied their forces and taught children about hazardous chemical substances. In order to adapt the theme to their age children are asked to play the parts of fairy tales in which the characters were poisoned - Snow White and Sleeping Beauty. Later, they used some laboratory items and harmless substances and made an antidote for the sleeping heroines. This way Serbian language and Chemistry are thematically linked.