In a definition every word counts ... ...

Don't confuse reading aloud a definition or a key point, with reading the entire content of slideshows.

Your lecturer never reads aloud the content of her slides (it is useless, boring and time-consuming). She always interacts with students.

She reads definitions and key points, worth 5% of the course content.

Your lecturer makes comments on each slide.

FYI the slideshows presented have been created by your lecturer.