We propose a gaze-based indicator of students’ attention in a MOOC video lecture. We report the results from an eye-tracking study during a MOOC lecture. We define the gaze- based indicator of students’ attention as “with-me-ness”. This answers a question from teachers’ perspective “how much are the students with me?” With-me-ness is defined at two levels: perceptual, following teacher’s deictic acts- and conceptual – following teacher discourse. We conducted an experiment with 40 participants and observed a significant and positive correlation between the two levels of with-me-ness and the posttest scores.