The effective teaching of data modelling concepts is very important; itconstitutes the fundament of database planning methods and the handling ofdatabases with the help of database management lan-guages, typically SQL. Weexamined three courses. The students of two courses prepared for the exam bysolving tests, while the students of the third course prepared by solving tasksfrom a printed exercise book. The number of task for the second course was 2.5times more than the number of task for the first course. The main purpose ofour examination was to determine the effectiveness of the teaching of datamodelling concepts, and to decide if there is a significant difference betweenthe results of the three courses. According to our examination, with increasingthe number of test tasks and with the use of exercise book, the results becamesignificantly better.
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