man, I am concerned with not being able to motivate them enough, I am concerned because this, right? That it won't make them sufficiently interested, that the class won't be sufficiently motivating, right?
hombre, a mí me preocupa no ser capaz de motivarlos suficientemente, me preocupa pues esto no? que no les despierte suficiente interés que no les resulte una clase suficientemente motivadora no?