Dear Sir/ Madam,
I am applying for the job of English teacher at your school, advertised in Sunday's edition of the Times.
I have always been interested in languages and during the school holidays I was at a 3-week course of English. I got a certificate. Moreover, the course was chaired by native Englishmen so I improved my skills of speech and writing. Please find details of my qualifications and work experience in the enclosed curriculum vitae.
Last year I was a student at University of Cracow. Since I left the school I have been on a holiday camp where I was one of carers. I had a group of 10 children. This camp gave me a chance to check my pedagogical skills.
I would be glad to attend an interview at any time convenient to you.
I look forward to hearing from you.