Marymount London on understanding the IB

Margaret Giblin, Headmistress of Marymount International School London, on how the IB delivers both academic excellence and skills for life

With SATS, GCSEs, A levels, MYP, IB, it sometimes feels like education is just one long string of acronyms. And with every new option comes a fresh wave of questions. What’s the difference? Which one is right for me? How will any of this actually help me in the future? It can feel overwhelming.

Apprenticeship, university, college – there are so many different doors to choose from. And of course, behind every door is a different pathway, a different workload, and a different outcome. The big issue that lingers for students (and for parents, too) is: what is our best choice?

If you want the shortest answer: there isn’t a one-size-fits-all path. But if you want a choice that is recognised globally, admired by universities, and respected for both its academic depth and its ability to form well-rounded young adults, then you’re probably looking at the IB Diploma Programme.

The International Baccalaureate, often called the IB, is more than just a qualification. It’s a philosophy of education that values breadth as much as depth. While A levels, for example, ask students to specialise and narrow down, the IB keeps the doors open. Students study six subjects, ranging from languages and sciences to mathematics and the arts. Subjects sit alongside three core elements: Theory of Knowledge (a course in critical thinking), the Extended Essay (a piece of independent research), and CAS (Creativity, Activity, Service – ensuring students develop beyond the classroom).

This mix is what makes the IB so special. It’s rigorous, yes, but it’s also holistic. It doesn’t just prepare students to pass exams but to think, to question, to collaborate, to understand the bigger picture, and to explore the world around them. That’s why it’s sometimes referred to as a gold standard of education. From Oxbridge to the Ivy League, admissions officers respect the IB because it signals that a student hasn’t just passed exams but has developed independence, resilience and a genuine love of learning.

At Marymount, we’re proud to be the only all-girls, IB-only school in the UK. For us, the IB isn’t just an option, it’s our entire focus. And that focus delivers results. In 2025, our students achieved a 100% pass rate with an average score of 37 points, well above the global average of 31. These aren’t just numbers – they represent real young women achieving their potential and ready to step into the next stage of life with confidence.

But beyond the grades, we believe what sets our IB journey apart is the experience. Our students aren’t here simply preparing for exams they are learning how to think critically, act compassionately, and engage with the world around them. They leave not only with a diploma, but with the mindset and skills to thrive in any university, career, or community they choose to join. So, if you’ve ever wondered what the IB is and why it matters here’s the short version: it’s an education that challenges, supports and transforms you.

Marymount International School London marymountlondon.com

Further reading: Rugby School on developing independent thinkers