Since ETRA'16 tutorials are part of ETRA conference being an important platform for the up-to-day knowledge sharing within the eye tracking community. The tutorials are meant to be a platform for sharing in-depth information on eye tracking methodology, data analyses, visualizations, and applications in different fields. ETRA'21 will include a number of half-day and full-day tutorials, where experts in the field cover a topic related to eye tracking or eye movement research within the general theme of the conference "Bridging the Communities". All tutorials as the whole ETRA’21 conference are going to be online only. We encourage all experienced eye tracking researchers to submit the tutorial propositions which are going to be of high importance for the field. The submission should include the A) extended abstract (up to 350 words), B) tutorial scope (up to 100 words), C) tutorial audience (up to 100 words), D) bio sketch of the teacher(s) (up to 100 words). Indicate also, which conferencing and communication technologies you plan to use for various activities. The deadline for the submission is March 28, 2021. Submissions can be made through the submission form https://forms.gle/iLR5WWEn2vkcSH8J9 <https://forms.gle/iLR5WWEn2vkcSH8J9> For questions, please email Krzysztof Krejtz (kkrejtz@swps.edu.pl <mailto:kkrejtz@swps.edu.pl>) or Roman Bednarik (roman.bednarik@uef.fi <mailto:roman.bednarik@uef.fi>) ETRA 2021 Tutorial Chairs. Kindest Regards, ETRA 2021 publicity chair, -------------------------------------------------------------------------- Soha Rostaminia (people.cs.umass.edu/~srostaminia/ <http://people.cs.umass.edu/~srostaminia/>) College of Information and Computer Sciences, UMass Amherst