During this project we have created a product for the company FeedbackFruits to promote critical thinking in education. Research has shown that argument mapping is a promising method to promote critical thinking. Several existing related platforms were analyzed to draw lessons from their experience. Literature research revealed that product interaction design is very important for teacher adoption and student engagement, which were are also identified as key factors for product success by the client company. We took steps to realize this requirement by researching student engagement and adopting company guidelines used to ensure quality design (e.g. use of company UI framework, internal design review, user testing). User tests indicated enthusiasm and high engagement by the participants, but also showed clear areas of improvement. Though comparable existing solutions are promising for teaching critical thinking, further development and testing would be needed to validate the didactic potential of this product. Considering the limited time available for the project, we have included this in the recommendations on future development and research.