Teachers don't talk parents into giving their children drugs...for any reason.
Within the school environment, there are many types of tests administered which help all who are involved with the education of a child plan the best educational program for him or her. It's rather like a doctor administering diagnostic tests to determine what's wrong with a patient.
Diagnostic behavioral tests are always adminstered by a physician after the teacher, the school counselor, and the parent fill out extensive questionaires about what behavior the child has demonstrated within the home and the school. After the questionaires are scored, the parent is then given the results, perhaps with a recommendation for him or her to take the results to his or her family doctor for further consultation/evaluation.
If the family's doctor thinks the child would benefit from taking a medicine that would help him or her concentrate and remain calm for a period of time so leaning can take place, the doctor is the one who recommends it to the parents...not the teacher. Perhaps the teacher will be required to give the medicine to the child once he or she has a prescription, but even then there is extensive paper work to be done, and the teacher has to give the meds with a reliable witness present, and keep a log indicating the meds given, how much, when, and who was witness.
"Behind every great fortune lies a great crime."
Honore de Balzac
"Democrats work to help people who need help.
That other party, they work for people who don't need help.
That's all there is to it."
~Harry S. Truman