Turning zoos into smart learning ecosystems. - Terje Väljataga; Kadri Mettis (IxD&A, 2018)

Analyzing Integrated Learning Scenarios for Outdoor Settings. - Terje Väljataga; Kadri Mettis (ICWL, 2019)

Learning through Creating Artefacts for Outdoor Settings with Smartzoos Application: Students Challenges and Experiences. - Kadri Mettis; Terje Väljataga (ICALT, 2020)

Enhancing Teacher-Students' Digital Competence with Educational Robots. - Elyna Heinmäe; Janika Leoste; Külli Kori; Kadri Mettis (RiE, 2021)

Designing learning experiences for outdoor hybrid learning spaces. - Kadri Mettis; Terje Väljataga (Br. J. Educ. Technol., 2021)

Investigating Students' Conceptual Understanding of Socio-Environmental Problems. - Kadri Mettis; Terje Väljataga (Int. J. Mob. Blended Learn., 2022)

Mobile Outdoor Learning Effect on Students' Conceptual Change and Transformative Experience. - Kadri Mettis; Terje Väljataga; Õnne Uus (Technol. Knowl. Learn., 2023)