Clearly unethical. Take written notes. Join your union.

But a few side points:

- ADHD is an actual condition that can cause lack of focus and/or hyperfocus

- there are plenty of other reasons why a person can exhibit lack of focus and/or hyperfocus

- in people with ADHD, stimulants are often very effective, but dosage and side-effects need careful medical management

- in people without ADHD, stimulants often make them feel like they are more focused that ever before, but blind studies have shown that their actual focus is not truly affected