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Testimonials

Students and parents, in their own words.

Every testimonial here was submitted with a name, level and school, then read and approved by ZAK. Nothing anonymous, nothing invented — the same students who sat the Cambridge papers.

23

approved testimonials

14

schools & centres

18

with a stated result

100%

reviewed by ZAK

O Level / IGCSE Featured

I had the privilege of being taught Computer Science by Sir Zafar Ali Khan during my O and A Levels, and I will always be deeply grateful that I was his student. He is an exceptional teacher, but what I value most is the genuine care, generosity and selflessness he has always shown me. He gave me his time, knowledge and support so freely, often going far beyond what anyone could expect from a teacher. Much of the confidence and passion for learning that I carried forward in life began in his classroom, and I truly believe his influence played a part in the person I became. Even years later, he has never hesitated to guide or help me whenever I have reached out. Some teachers leave you with good grades Sir Zafar left me with something far more lasting. I can never fully thank him for everything he has done for me, and I feel incredibly fortunate to still call him my mentor.

Eisha Azam · Former student

O Level · Private · Lahore · M/J 2019 · A · Working as a freelancer

A

A Level Featured

ZAK didn’t just teach Computer Science; he had an incredible way of inspiring and uplifting his students. From supporting us in the classroom to being there for us and responding even after class hours, ZAK always went above and beyond. The love for CS that I developed started with his classes, and I’m genuinely grateful for that foundation. With technology evolving so rapidly, I can only imagine how much more enriching the experience of learning from him must be today

Amna Shah · Former student

A Level · Beaconhouse College Defence · Karachi · May/June 2021-2022 · A* · SWE @ Metal (YC & a16z), Ex-FASTian

A*

A Level Featured

I was fortunate to study A-level Computer Science with this teacher in Pakistan. He made the classroom welcoming, explained difficult concepts clearly, and always made learning enjoyable. His teaching has stayed with me well beyond A-levels. The foundation he gave me in computer science, especially low-level languages, has been incredibly helpful as I study at Simon Fraser University in Canada. Many of the concepts we covered and assignments we completed prepared me for my first- and second-year university courses. He is a friendly, dedicated, and truly excellent teacher. I’m grateful for the confidence and strong foundation he helped me build.

Areez Momin · Former student

A Level · The City School PAF Chapter · Karachi · May/June 2023 · A* · Simon Fraser University - Vancouver, Canada

A*

O Level / IGCSE

It was good learning experience from ZAK back in 2016-2017. I think we had a lot of resources to study and the classes were interactive and fun.

Muhammad Razi Moosa · Former student

O Level · Nixor O Level · Karachi · May/June 2017 · A · Data Analyst @ Outpost

A

A Level

Sir ZAK took an unorthodox approach to teaching as during assessing the learned concepts, he used to try to come up with papers of his own. It felt like a fresh approach as at the time most teachers just used to regurgitate past papers

Syed Aahmad Adnan · Former student

A Level · The City School · Karachi · M/J 22 & 23 · A* · Full-time job at HK after graduating from CityUHK with a bachelors in CS

A*

O Level / IGCSE

ZAK doesn't just teach a class, he mentors every student individually. His ability to break down complex topics and his willingness to offer personalized guidance made all the difference in my learning journey. His constant support and passion for the subject are the exact reasons I fell in love with computer science and chose it as my career.

Izaan Ahmed Khan · Former student

O Level · Karachi Public High School · Karachi · May/June 2016 · Studying M.Sc in Data Science in Germany

AS Level

FIRST OF ALL I WANT TO ACKNOWLEDGE THIS WEBSITE IT CONTAINS EACH AND EVERY ASPECT OF MATERIAL A STUDENT NEEDS TO STUDY CS

IBRAHIM SHIRAZ · Current student

AS Level · SCEPTRE COLLEGE · KARACHI · MAY JUNE 2026 · A · A2

A

A Level

It was a really great experience. I’ve never had such a fun and enjoyable environment in a class before. Sir Zafar’s classes made learning genuinely interesting and something to look forward to.

Muhammad Waleed · Former student

A Level · Askari · Karachi

A2 Level

I had an amazing experience learning from sir ZAK. His approach to teaching Computer Science is incredibly practical and engaging, and he really knows breaking down complex concepts like programming into clear, simple to understand points. Thanks to his guidance, I’ve built a strong foundation and gained a lot of confidence in my abilities, which has helped me a lot as I pursue my Bachelor's in Computer Science. I highly recommend sir ZAK to anyone looking to seriously level up their CS knowledge!

Mahboor Hussain · Former student

A2 Level · The City School PAF Chapter · Karachi · May/June 2025 · A* · Studying CS at FAST

A*

A2 Level

Sir Zafar is one of the best computer science teachers. His way of teaching made complicated and difficult topics very easy to understand. Because of him I was able to improve my grade from C in AS to B in A2.

Muhammad Khubaib Sabir · Former student

A2 Level · The City School · Karachi · May/June 2026 · B · Studying CS at FAST

B

O Level / IGCSE

I took up O-levels Computer Science as an extra subject and needed a teacher who could prepare me for the exams. Wherever I looked, one name was there "Sir ZAK". His classes and way of teaching is amazing. I remember I used to stay after classes and ask a lot of questions from past papers and Sir ZAK always answered each question. His down to earth personality, ability to explain difficult concepts and amazing study material made him a teacher I would never forget. I remember looking forward to his weekend morning classes at Askari Bahadurabad just because I always enjoyed his teaching. Thank you Sir ZAK! May Almighty always bless you!

Faiq Azhar · Former student

O Level · St. Michael's Convent School · Karachi · May/June 2019 · A · Graduated from NED

A

A Level

Sir ZAK made his classes engaging and ensured we genuinely understood the subject. He was always willing to answer questions and explain concepts from different perspectives, helping me build strong foundations rather than rely on memorisation. He often went beyond the A-Level syllabus, and this additional knowledge proved useful at university, where I encountered familiar concepts. He also consistently checked on his students and helped whenever we struggled. Overall, his teaching gave me excellent conceptual clarity and prepared me well for university.

Ayman Essa · Former student

A Level · Cedar college · Karachi · A · Studying CS at IBA

A

A2 Level

Sir ZAK is among the most dedicated and passionate computer science teachers I have, his notes and lectures provide great depth to computer science at times beyond the scope of the syllabus which is something that has helped me throughout the year.

Muhammad Shahmeer · Current student

A2 Level · Cedar College · Karachi

A Level

Sir ZAK is an exceptional teacher. Be it explaining the concepts or guiding through past papers, he is always there to help, and if you get really stuck on a topic, it's no problem, because sir won't just move on, he'll re-explain the topic till everybody understands. And it doesn't just stop there: if you're doing something that goes beyond the scope of the syllabus and need sir's help, he will always be there for you. Beyond that, his life experiences shared during class have taught me valuable life lessons that really guide me in life. If you're looking for a CS teacher, you don't need to look any further than sir ZAK.

Ayan Gul Memon · Former student

A Level · Cedar College - PECHS · Karachi · M/J 26 · A* · Studying Cybersecurity at FAST

A*

A Level

Sir ZAK is one of the very few great CS teachers in Karachi. He is excellent in explaining difficult concepts and is super helpful to students. I joined CS because of personal interest and while the course itself felt very boring to me, Sir ZAK made it interesting throughout. One of my favourite memories from college is where I would bunk classes and he would somehow always catch me in the hallways and tell me to be serious about my studies :) I am grateful to have studied from such a teacher in my life. He certainly is one of the reasons I chose to pursue CS and did not switch to another domain.

Syed M Abdullah Yousuf · Former student

A Level · The City School · Karachi · May/June 2023 · B · IBA Karachi

B

O Level / IGCSE

ZAK was an absolute lifesaver for my CS exams! He actually makes the hard concepts click instead of just forcing you to memorize the syllabus. The ZAKATHON revision sessions right before the papers were amazing, and having all his coding tools and past papers in one place took the stress out of studying. Highly recommended!

Syed Eisa Bukhari · Current student

O Level · The City School PAF Chapter · Karachi · May/June 2027

A Level

Excellent teaching style, he keeps the whole class engaged so that its never boring. Favourite cs teacher

Umar Aamir · Current student

A Level · WHALES College · Karachi · May/June 2026 · A · BS Cs at NED

A

A2 Level

I had the opportunity to study with sir ZAK in my alevels and the way he embedded computer science concepts in our head, it still helps us when creating CS applications at the university level.

Malik Saad · Former student

A2 Level · The City School · Karachi · May/June 2025 · A*

A*

A Level

As an educator, Sir ZAK's experience in the field of CS shows. As a self taught programmer, I was fundamentally lacking in the basics of CS theory. Sir ZAK's explanations of everything from logic gates to recursion were so intuitive and easy to understand, it completely overhauled the way I approached past papers and programming in general. I would 100% recommend Sir ZAK's services to anyone learning CS. He is literally a game changer.

Hasan Adil · Former student

A Level · Cedar College · Karachi · May/June 2026 · A

A

A Level

Choosing Computer Science for A Levels was a difficult decision. During O Levels, our practical Paper 2 was exempted due to COVID-19, leaving a gap in my practical knowledge. Joining Sir Zafar for AS changed that. Learning Visual Basic and Python, watching him code, and solving problems through logic and debugging made me genuinely interested in programming. Our AS Paper 2 was challenging due to a changed pattern, and I even considered dropping the subject. Sir Zafar believed in me and asked me to wait for my results. Receiving an A gave me the confidence to continue with A2. His encouragement pushed me to aim higher, eventually leading to the A* he had envisioned for me. I am grateful for choosing Computer Science, but even more grateful to Sir Zafar for believing in me and helping me realise my potential.

Rafay khan · Former student

A Level · The city school PAF chapter · Karachi · 2022-2023 · A* · FAST

A*

AS Level

Sir Zafar is a really nice teacher his intellectual level is really high which is both a positive and negative for us. Sometimes he might just become very much advance while giving lectures without realising but overall he is pretty nice

Musa Asim · Former student

AS Level · The City School · Karachi · May/June 2025 · U · Doing FSC

U

A2 Level

I was really happy to study from Sir Zafar Ali Khan. Not only he just teaches but he explains the concepts properly and helps students get knowledge according to the paper what examiner has asked.

Abdur Rahman · Former student

A2 Level · Zatians · Karachi · May June 2026

O Level / IGCSE

SIr notes was very useful and his teaching style is different from others . Also the way he tought us psecudecode is like very helpfull .

Azfar Ahmed · Former student

O Level · SKH gulshan · karachi · May/June 2025 · B · A2

B

23 of 23 testimonials · every one reviewed and approved by ZAK before it appears here.

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