Research has shown that after chemical experiments, the most desired work of students during their hours of chemistry is playing chemically oriented games, solving chemical crosswords, quizzes etc. The use of this resource in the classroom is, compared with chemical experiments, safe and accessible. To its targeted use, a relatively great attention is devoted in the literature. We present some experience using databases of two-subjects interdisciplinary tasks for teaching chemistry (the results of two years of research among 900 pupils of 8th and 9th grades of primary schools).