Thinking back and forth between observing physical phenomena and developing scientific ideas, also known as hands-on and minds-on learning, is essential for the development of scientific
reasoning in primary science education. In the Netherlands, inquiry-based learning is advocated as the preferred teaching method. However, most teachers lack time and sufficient pedagogical content knowledge to adequately provide the teaching required for this. To address this problem, we designed and evaluated science and technology lessons, consisting of hands-on experiments combined with interactive diagrams, aimed at scaffolding primary school students (9–12 years) in the development of their scientific reasoning. Our proof-of-concept uses an online application, that lets students work through the lessons while alternating hands-on and minds-on activities. A
study was carried out (n = 490) showing that most students successfully complete the lessons within a standard lesson timeframe. The approach enables students to effectively apply
several types of scientific reasoning and to do so more autonomously than in traditional science classes.