In Greek primary education there is no mention of Eratosthenes' method. Primary school students are taught at school that the shape of the Earth is “an oblate spheroid” by a series of impressive photographs of the Earth from space. This knowledge remains useless, if students do not engage themselves in "measuring the Earth" with simple mathematical calculations .

This activity aims to create awareness among students about the use of lighting and sound technologies. It provides an opportunity to seek solutions and utilize STEM skills. Students develop skills in energy efficiency, technological innovation, problem-solving, and communication, allowing them to explore the impact of technological advancements in their daily lives. This activity encourages active participation in the field of STEM. To explain the applications and importance of lighting and sound technologies to students. To help students understand the basic principles of lighting and sound technologies. To enable students to critically evaluate technological products. To enhance students' problem-solving and creativity skills. To encourage collaboration and communication skills through group work.

This activity aims to teach students how to measure time and design a sundial by observing the movement of the sun and the formation of shadows. Students combine their scientific, mathematical, and design skills by creating a sundial that operates based on the movement of the sun. The activity focuses on direct observation, data collection, and analysis. It also helps students understand the basic concepts of the sun's movement and the angle of sunlight, fostering their interest in the sciences.