Meet the teacher
Saad Zai
Biology Teacher
Sir Saad Zai teaches Biology at Learners Academy, with 12 years of teaching experience. Previously taught at LGS JT, BDC, Bll, LGS Phase 5, Crescent, Kaizen, UCL and The City School. Twelve years of making biology click before exam day.
Teaching
- Teaches
- Biology
- Levels
- IGCSE / GCSE / O Level, AS & A Level, and IB (MYP and Diploma)
- Exam boards
- Cambridge · OCR · OxfordAQA · IB
- Teaching experience
- 12 years
- Previously taught at
- LGS JT, BDC, Bll, LGS Phase 5, Crescent, Kaizen, UCL, The City School
These details were taken from the published faculty listing and last checked on 2026-08-18. Where a school is listed above, it records where this teacher has previously worked — it is not an endorsement of Marlbridge by that school.
Study with Saad
The first trial class is free. Your request will say you asked for Saad. We will tell you honestly whether Saad has room at your level and time — we cannot guarantee a specific teacher in advance, but we will tell you who it is before the class is scheduled. We reply to WhatsApp messages within an hour, between 8am and 11pm Pakistan time every day, and to email enquiries the same day.
- Group classes
- Up to 15 students. 45 to 50 minutes per class, 3 classes a week, per subject. In Pakistan from 19,000 PKR per subject per month (IGCSE, GCSE, O Level).
- One-to-one
- 1 hour per class. How many classes you take is up to you. In Pakistan from 3,500 PKR per class.
OCR courses, and OxfordAQA Islamiyat and Pakistan Studies, are taught one-to-one only (no group option); the multi-subject and sibling discounts do not apply. In Pakistan 6,000 PKR per class.
A Level, IB and other regions are priced differently: Fees in your currency. Teachers are available 24 hours a day, 7 days a week, so one-to-one classes can be arranged at any time that suits your time zone. Group class times are agreed with the families in each group, and we confirm them in your own time zone before the trial.
Published for Marlbridge by Saad Zai — free to read whether or not you study with us.
Resources
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Practice questions
Biological Molecules: Practice Questions
Original exam-style practice questions with full worked answers on carbohydrates, proteins, lipids and food tests.
Cambridge · O Level
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Revision notes
Biological Molecules: Revision Notes
Condensed recall notes on carbohydrates, lipids, proteins, DNA and the food tests for Cambridge O Level Biology 5090.
Cambridge · O Level
Revise topic -
Practice questions
Cell Structure and Organisation: Practice Questions
Original exam-style practice questions with full worked answers on cells, organelles, specialisation and levels of organisation.
Cambridge · O Level
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Revision notes
Cell Structure and Organisation: Revision Notes
Condensed recall notes on animal, plant and bacterial cells, specialisation and levels of organisation for Cambridge O Level Biology 5090.
Cambridge · O Level
Revise topic -
Practice questions
Enzymes: Practice Questions
Original exam-style practice questions with full worked answers on enzyme action, temperature, pH, denaturation and enzyme uses.
Cambridge · O Level
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Revision notes
Enzymes: Revision Notes
Condensed recall notes on enzyme action, the lock-and-key model and the effects of temperature and pH for Cambridge O Level Biology 5090.
Cambridge · O Level
Revise topic -
Study guides
Biological Molecules
The chemical elements and building blocks of carbohydrates, lipids, proteins and DNA, and the food tests used to identify them, for Cambridge O Level Biology 5090.
Cambridge · O Level
Read guide -
Study guides
Cell Structure and Organisation
Animal, plant and bacterial cell structure, cell specialisation, and the organisation of cells into tissues and organs, for Cambridge O Level Biology 5090.
Cambridge · O Level
Read guide -
Study guides
Enzymes
Enzymes as biological catalysts, the lock-and-key model of enzyme specificity, and the effects of temperature and pH on enzyme activity, for Cambridge O Level Biology 5090.
Cambridge · O Level
Read guide