I want to write a short introduction for a CV for coaching / mentoring classes. I want to say that my name is Guillaume, I'm French, fluent in French, English and Spanish. Graduated from Cambridge and École polytechnique, have lived across the world in Nigeria, Brunei and Venezuela. High expectations, rigor, which helped me coach a class of 30 students, all of them entering top 2 french university (historic results).

That is perfect, could you add at the end that I can provide maths & physics classes, coaching for SoP and mentoring sessions?

Rewrite this, to make it more convincing: "As a dedicated and experienced mentor, I bring a global perspective to my teaching, having lived in Nigeria, Brunei, and Venezuela, which enriched my understanding of diverse educational environments. I am fluent in French, English, and Spanish, and hold prestigious degrees from both University of Cambridge and École Polytechnique. I set high expectations and maintain rigorous standards, which have proven successful in my coaching career. Notably, I have guided a class of 30 students to achieve historic results, with all of them gaining admission to the top two engineering Grande Ecole in France. My commitment to excellence and my ability to inspire students to reach their full potential are the cornerstones of my mentoring philosophy. As such I’m happy to provide classes STEM subjects, as well as coaching for SoPs and personalized mentoring sessions. I’m ready to be instrumental in your child’s success!"