Join multidisciplinary and international teams at the ECIU University and solve mini challenges provided by business and societal partners across Europe. Participation in mini challenges will allow you to make a real impact in the community, city, or region by solving real-time local, national, and global challenges with a new way of learning - the challenge-based learning. General procedure of a challenge: 1. The mini challenge is provided by a city, region or business stakeholder and is entered on the ECIU University Challenge platform (https://engage.eciu.eu/browse). 2. You register to the mini challenge you find relevant information on the platform. 3. An international and interdisciplinary team is formed from registered participants from all ECIU partner universities and a team facilitator from the host university is assigned. 4. You work with the team on the mini challenge, engage, investigate, and propose non-technical solutions using the challenge-based learning methodology (https://www.tuhh.de/eciu/challenge-based-learning) 5. During the process, you can select relevant micro-modules from ECIU member universities that help you gain additional knowledge or skills that are relevant to solve the mini challenge. 6. Finally, teams deliver their outputs - which may include services, products, research questions, start-ups and spin-offs. TUHH is major part of the ECIU University leading institution related to the Challenge-based learning. All ECIU challenges will constantly be updated at the challenge platform: https://engage.eciu.eu/browse “Standard Challenges” are Challenges in the ECIU University that are supposed to be done within 12-15 weeks/whole lecture period. Focus is to define a relevant societal challenge, aims to find a collaboratively developed solution, which is environmentally, socially and economically sustainable