This study investigated how teachers' visual focus of attention is associated with students' basic academic skills and teachers' individual support for students in basic academic skills in authentic classroom settings. Teachers' (N = 46) visual focus of attention in the classroom was measured with mobile eye-tracking, and students' (N = 879) literacy and math skills were tested in Grade 1. The results revealed that teachers' visual focus of attention in terms of fixation counts correlated with students' basic academic skills and teachers' individual support for students in literacy and math. Two case studies showed that teachers' visual focus of attention varied among students with different teacher-reported individual support. It might indicate that the number of students with high teacher individual support in the classroom could influence how evenly teachers are able to distribute their attention. The practical implications of our findings suggest that it is essential to ensure the appropriate distribution of students who require greater individual support so these students can receive more of the teachers' visual focus of attention in the classrooms.