ENIt is particularly important to conduct research on younger school-age students’ social and emotional health, strengths and weakness of health in the context of (non)crisis (Covid-19 quarantine). Purpose. To investigate younger school-age students’ social and emotional health in the Lithuanian sample. Method. Social and Emotional Health Survey-Primary (Furlong et al., 2013). The sample: 161 school-age students from various Lithuanian primary schools. The research conclusions. Gender-related differences in students’ social and emotional health were not identified. The Covid-19 quarantine crisis has led to deterioration of social emotional health of younger school-age students. Keywords: social and emotional health; younger school-age students; Lithuanian sample; Covid-19 crisis. [From the publication]