Letter written to parents to invite them to a free tutoring assesment

we tutor maths science and English from 5-year-old students through to A levels, we are ofsted registered and run private exams, we have equipment from Leeds University including microscopes and pcr machines. Our teachers are A grade achievers and we have ex-students with some of the highest grades in the area. we are in need of a letter which will go out to people who have not used our services in the local area. I have attached a letter head that gives some of our credentials