The COVID-19-induced distance education was perceived as highly challenging by teachers and students. A cross-national comparison of five European countries identified several challenges occurred during the distance learning period. On this basis, the article aims to develop a theoretical framework and design requirements for distance and online learning tools. As one example for online learning in mathematics education, the ASYMPTOTE system is introduced. It will be freely available by May 2022. ASYMPTOTE is aimed at the adaptive and synchronous delivery of online education by taking a mobile learning approach. Its core is the so-called digital classroom, which not only allows students to interact with each other or with the teacher but also enables teachers to monitor their students’ work progress in real time. With respect to the theoretical framework, this article analyses to what extent the ASYMPTOTE system meets the requirements of online learning. Overall, the digital classroom can be seen as a promising tool for teachers to carry out appropriate formative assessment and—partly—to maintain personal and content-related interaction at a distance. Moreover, we highlight the availability of this tool. Due to its mobile learning approach, almost all students will be able to participate in lessons conducted with ASYMPTOTE.

Background: Data on stroke caregivers’ sleep is scarce. We aimed to assess changes in duration, satisfaction and sleep quality among informal caregivers of stroke survivors. Methods: Informal caregivers (n = 126) of stroke survivors hospitalized between September 2018 and August 2019 in the 12 Stroke Units of the North of Portugal were invited to participate in the study, 18 months’ post-stroke. Sociodemographic and sleep characteristics (duration, satisfaction and quality) were collected through structured questionnaires. Odds ratios and 95% confidence intervals (95%CI) were estimated through logistic regression, adjusted for age and sex. Answers to open-ended questions were synthetized using content analysis. Results: Due to care provision, informal caregivers reported sleeping, on average (SD), significantly less hours (7.0 (1.7) vs. 6.4 (1.8); p < 0.001). Since its beginning, caregivers’ satisfaction with their sleep decreased approximately 30%. Changes in sleep quality, namely difficulties in falling asleep and constant interruptions during sleep, were reported by almost 70% of caregivers. Only 6.4% described the prescription of medication to sleep after beginning care provision. Participants who returned to work (adjusted OR = 0.34; 95%CI:0.16-0.76) and with a monthly income above 1000€ (adjusted OR = 0.29; 95%CI:0.13-0.66) were less likely to report changes in sleep quality. Conclusions: A decline in duration, satisfaction and sleep quality of informal caregivers of stroke survivors, 18 months’ post-stroke, was observed. Changes in sleep quality revealed socioeconomic inequalities, highlighting the need to prevent adverse health outcomes related to sleep disturbance. Key messages: Sleep health dimensions of stroke caregivers should be considered an additional dimension of the post-stroke care services.