Motivation as a variable in L2 development is no longer seen as the stable individual difference factor it was once believed to be: Influenced by process-oriented models and principles, and especially by the growing understanding of how complex dynamic systems work, researchers have been focusing increasingly on the dynamic and changeable nature of the motivation process. In this study we micro-map the motivational dynamics of 4 language learners during their language lessons over a period of 2 weeks, using a novel instrument--the Motometer--combined with classroom observations and a questionnaire on motivation and attitude. The article answers three current questions concerning L2 motivation: (a) Can we demonstrate variability in students' L2 motivation in class; (b) Is there a detectable stable level of students' in-class motivation; and (c), If both of these are demonstrated, can they be accounted for by the classroom context? The results affirm that student motivation can be successfully explored using a dynamic systems framework. Our findings demonstrate how motivation changes over time on an individual level, while also being characterised by predictable and stable phases, and how it is inseparable from the learner's individual learning context. The data also show that motivation can be meaningfully studied at different interacting time scales.