Only one recommended is teachmepolish.pl - Dorota (the owner) is a very nice person.
Related:
Looking for Fashion,Photography courses and Polish Language courses in Poznan?Hello i am seeking a Fashion course,Photography course and Polish Language courses in Poznan? I hope to start any of these in October Or if you have any idea of any other creative courses around Poznan get back to me my email address is @yahoo.co.uk Thank you in anticipation.
Courses must be conducted in English.
Polish Language courses are done (mainly) by UAM - but the tuition fees are pretty high.
I've never seen any other creative courses done in English in Poznan - there's just no demand for them.