Reference letter for student applying to science major

I am writing this reference at the request of Elitsa Yalamova who is applying for University of Groningen. I have known Katie for two years in my capacity as a teacher at First PrivateEnglish School. Elitsa took the entire course in Mathematics from me and earned superior grades in those classes. Based on her grades, attendance and class participation, keen focus, I'd rate Elitsa’s academic performance in my class as superior. She can be easily described as a perceptive, quick individual with a high aptitude for math and science. For the past two years she has willingly been taking extra math classes in order to be truly prepared for the state exams. I am sure that her hard work will be well paid with the great result she is going to achieve. I have been a teacher more than 20 years and have seen a lot of students, so I can easily claim that Elitsa is one of the brightest students I have ever taught. Her understanding and keen interest in science and technology are some of her most remarkable traits. Indeed, there are many students fond of science, however there are a few who are having in mind a big world wide problem to solve or target to be achieved. I am certain that Elitsa is going to achieve great and creative things in her future in order to fulfill her full potential. I highly recommend her for admission to your undergraduate program.