Experiments, as we all know, are especially important in science education. However, their impact on improving thinking could be even greater when applied together with the methods of inquiry-based learning (IBL). In this paper we present our observations of a high-school laboratory class where students used computers to carry out and analyse real experiments. During the class students used Edaq530, a low-cost, compact and easy-to-use digital measurement solution [http://www.inf.u-szeged.hu/noise/edudev/EDAQ530/]. It allowed them to see the results of the measurements real-time on the screen. This technique enables students to make a lot of measurements themselves, get to know the steps of data analysis, and discover relationships and laws in physics which were previously unknown to them.