Positive feedback, from former students who feel they are finally able to emerge from the deep pronunciation rut they have been stuck in for years, is particularly rewarding.
Some comments from former students’ feedback questionnaires and letters:

“The program was overall very good! The course was always well prepared. It’s a pity I have to go back to Switzerland.”

A German speaking, Swiss manager of a pharmaceutical company

“After my return to my home country( the Czech Republic), we agreed to continue with the lessons on Skype. I was really grateful for the opportunity.
I have studied English at University in Prague and now I teach English. I find my lessons with Prof. Perczuk very useful for my work. She has helped me to improve my foreign accent significantly. She listens to my free speech and detects pronunciation problems. She keeps giving me tips how to avoid making mistakes, teaches me how to pronounce the tricky sounds, words and how to speak fluently by using weak and strong forms and linking. She keeps extending my vocabulary by making me express my opinion on various controversial topics. She keeps giving me a number of idioms and collocations.

My English has improved dramatically since I started working on it with Yvonne.

A Czech speaking, English teacher on SKYPE classes