Abstract: The conjecture is proposed that by observing and paying close attention to the movements of attention and energy in oneself, it is possible to sensitise oneself to notice similar shifts in the attention and energies of learners. This enables teachers to make appropriate choices in the midst of a lesson. A phenomenological stance is taken, by offering some mathematical tasks to undertake through which it is possible to notice shifts in attention and energies. These possibilities are then described, and related to possible questions deserving of further research.

Key words: Attention; Energy; Affect; Phenomenology; Noticing