I have a high level of the English language (C1). I can help my students with grammer, speaking and listening

I have always had the opportunity to spend from two up to four weeks abroad during my summer breaks in high school and in the first year of my bachelor to improve and practice my English. I have been tutoring middle school and high school students in Maths, Physics and English for more than 2 years. I am aware of the difficulties that students might come across during their learning process and I would be more than happy to share some tips and help them to improve and perfect their English.