Originally Posted by
Ditto
Assuming it is legal by Czech authorities to attend the semester on a tourist visa
It seems to be allowed, questions 9 and 12:
9. For which purposes can I travel without a visa to the Schengen area?
You can come as a tourist, to visit friends or family, to attend cultural or spor
ts events or exchanges, business meetings, for journalistic or media purpos
es, medical treatment, for short-term studies or training and any similar activities.
12. Will I need to apply for a visa and/or study permit if I plan to trave
l to the Schengen area for short-term studies?
You will need to apply for a study permit only in case you intend to undertake studies exceeding 90
days of stay in the Schengen area within a period of 180 days. For longer studies you have to apply
for a study permit and the rules vary from country to country. Th
erefore it is recommended to consult the Embassy/Consulate of the
country in which you intend to study.