We are very pleased to publish your paper in this book of proceedings. This issue covers the papers presented at the 11th International Adult Education Conference - In Diverse Learning Environments (IAEC 2021), held on 15th December 2021 in Prague, Czech Republic. This year we built on the success of the 2020 Virtual Conference and also enabled a hybrid of virtual and face-to-face presentations.The conference was traditionally organized by Czech Andragogy Society in main cooperation with Charles University in Prague. We have been working with Matej Bel University in Banská Bystrica (Slovakia) and University of Warsaw (Poland).Charles University is the oldest university in Central Europe. The university traditionally supports and implements excellent science in the field of humanities and other sciences. The Czech Andragogy Society is the largest professional organization in the Czech Republic, dealing with the development and research in adult learning and education. The 11th edition of the conference was also strongly influenced by the ongoing covid-19 pandemic. Therefore, most contributions reflect current education issues. The content of the book of proceedings thematically corresponds with the main topics of the conference:
Augmented reality - co-teaching, virtual and digital competences
. New challenges for professional development
. Social capital potential
. Up-to-date educational needs in the school environment