Dividing attention in the classroom reduces exam performance.

Dividing attention in the classroom reduces exam performance. Adequately contextualize  research findings within the wider scientific literature.  Discussion of future direction and any research questions remaining.

Even when there is little or no selection or switching effect, divided attention reduces retention of the targets for both tasks.

The effect of divided attention on retention is one example of a more general effect of limiting the amount of time available for study when the study material is initially presented.