Hydroponics is a new exciting educational tool to demonstrate plant growth to students. The term ‘hydroponic’ is used to describe plant cultivation in a water solution of soluble fertilizers or in an inert growing media. The creation of an educational hydroponic unit provides a visible insight to the process of plant growth to school pupils under real growing conditions. A closed-loop hydroponic unit will be created, which enables recycling of fertilizers and water, thereby minimizing environmental impacts and saving natural resources. Thus, getting familiar with plant cultivation in a hydroponic situation is anticipated to motivate school pupils to become more conscious of the need to preserve the environment. Students are challenged by the prospect of growing plants without soil. Combining theoretical teaching with a paradigm of practical application makes it much more interesting for the pupils to participate.