This is ADD - Neuroempathy

Attention Deficit Disorder is not classically well understood. Instead of suffering from a shortage of attention, an ADD may experience an overabundance of free attention available and waiting to be spent on everything, depending on mood. They will then place their attention on whimsy, a butterfly, a passing thought which they will play out every possible and probable stem to, and having assigned value through their attention to this action, they will seek to see it to fruition of a sort before moving on to an 'assigned' task.

This makes it appear that they do not have enough attention to pay to schoolwork or a comparably boring lesson or something that does not suit their 'whimsy'.

One conventional treatment uses amphetamines, which even further increase the ADD's attention span by speeding up the chemical interaxn in their minds and other physiology, allowing them to complete these primary thoughts of whimsy and even carry them on as they complete other 'assigned' tasks. They now have as much 'spare' attention as a normal person devotes 'direct' attention to an assigned task.

They may also benefit from increased mental proclivity allowing them to move rapidly along thought channels without losing their train, making small interruptions take less time and allowing the EM field of the thought to be stronger and easier to refind or reconnect to its original circuit. Muscular acuity may also increase, allowing faster or less attention-heavy completion of assignments.

This is ADD. See previous articles about ADD and thought logging or multiple task single channel recording.