The International General Certificate of Secondary Education, commonly known as IGCSE, is one of the most widely recognised academic qualifications for students between the ages of 14 and 16. Developed and administered by Cambridge Assessment International Education, a department of the University of Cambridge, the IGCSE curriculum is taught in over 150 countries and across more than 6,000 schools worldwide.
For school owners evaluating international curricula and for parents seeking a rigorous academic foundation for their children, understanding the IGCSE is essential. This article provides a comprehensive overview of how the IGCSE curriculum is structured, which subjects are available, how students are assessed, and how the IGCSE grading system works. It also explores how IGCSE results can serve as a strong stepping stone toward globally recognised post-secondary pathways.
How the IGCSE Curriculum Is Structured: Ages 14 to 16, Core and Extended Tiers
The IGCSE curriculum is a two-year programme designed for students typically in Grades 9 and 10, corresponding to ages 14 through 16. It follows a linear assessment model, meaning that students prepare throughout the two-year period and sit for all of their examinations at the end of the course. Exam sessions are held at designated points during the year, with the May/June and October/November sessions being the most common globally.
One of the defining features of the IGCSE syllabus is its tiered approach to assessment. In many subjects, students can choose between two levels of entry: Core and Extended.
The Core tier covers fundamental concepts and foundational knowledge. Students who follow the Core curriculum are eligible for grades ranging from C to G. This tier is suitable for learners who may find the full syllabus challenging or who do not plan to continue studying that subject at an advanced level.
The Extended tier includes everything in the Core tier, along with additional and more advanced content. Students entered for the Extended curriculum can achieve grades from A* to E. This tier is recommended for students who are aiming for top grades, particularly those who intend to progress to A-Level, the International Baccalaureate, or other pre-university programmes.
It is important to note that students do not need to choose the same tier across all of their subjects. A student may sit for the Extended tier in Mathematics and Science while following the Core tier in a language subject, depending on their individual strengths and academic goals. This flexibility allows schools to tailor the IGCSE programme to the needs of each learner.
Subject Groups, How Many Subjects Students Take, and How They Are Assessed
IGCSE Subject Groups
Cambridge offers more than 70 IGCSE subjects, making it one of the broadest international curricula available. These subjects are organised into several groups, allowing students to build a balanced and well-rounded academic programme. The main subject groups include:
- Languages (e.g. English as a First Language, English as a Second Language, French, Spanish, Mandarin)
- Humanities and Social Sciences (e.g. History, Geography, Economics, Psychology, Religious Studies)
- Sciences (e.g. Biology, Chemistry, Physics, Combined Science, Environmental Management)
- Mathematics (e.g. Mathematics, Additional Mathematics, International Mathematics)
- Creative and Professional (e.g. Art and Design, Music, Computer Science, Business Studies, Accounting)
Students are encouraged to select IGCSE subjects from across these groups to ensure breadth in their education, while still having the freedom to focus on areas of personal interest or strength.
How Many Subjects Do Students Take?
Most schools require students to take between five and nine IGCSE subjects. The typical recommendation is for students to complete at least five subjects to meet the entry requirements of most universities and post-secondary institutions. However, higher-performing students may choose to sit for seven or more subjects to demonstrate academic range.
Schools often designate certain subjects as compulsory, such as English and Mathematics, while offering a selection of optional subjects from which students can choose. The specific combination of compulsory and elective subjects varies from school to school, giving institutions the flexibility to design their own IGCSE syllabus offerings based on local needs and student demand.
How IGCSE Subjects Are Assessed
Assessment in the IGCSE curriculum varies by subject, but it generally includes the following methods:
- Written examinations are the primary form of assessment for most subjects. These exams are externally set and marked by Cambridge Assessment International Education, ensuring consistency and fairness across all participating schools.
- Coursework and portfolio assessment are used in subjects such as Art and Design, where students submit a body of work developed over the course of study.
- Practical examinations are a component of science subjects. Students may sit for a hands-on practical test in a laboratory setting or, alternatively, complete an Alternative to Practical paper, which assesses practical skills through a written format.
- Oral and listening components are part of language subjects, testing students’ ability to communicate and comprehend spoken language.
This combination of assessment methods ensures that IGCSE results reflect a well-rounded evaluation of student knowledge, understanding, and practical skills, rather than relying solely on written tests.
IGCSE Grading: A* to G and 9 to 1, and How Results Are Used for Admission
Understanding the IGCSE Grading System
The IGCSE grading system uses two scales that currently operate side by side, depending on the examination board and subject.
The A to G scale* is the traditional grading system used by Cambridge Assessment International Education. It has been in place for nearly 30 years and remains the most widely used scale globally. Under this system, A* represents the highest level of achievement and G the lowest passing grade. Students who do not reach the minimum standard for a G are classified as Ungraded (U).
The 9 to 1 scale was introduced following reforms to the GCSE system in England beginning in 2017. Under this scale, 9 is the highest grade and 1 is the lowest. Pearson Edexcel International GCSE uses the 9 to 1 scale across all of its subjects. Cambridge has also introduced the option of 9 to 1 grading in select regions and for specific subjects, while continuing to offer the A* to G scale worldwide.
The approximate equivalence between the two scales is as follows: grades 8 and 9 correspond roughly to A*, grade 7 corresponds to A, and grade 4 is generally considered a standard pass, equivalent to a C under the letter-based system.
It is also important to understand how the tiered system affects available grades. Students entered for the Core curriculum can achieve grades from C to G (or 5 to 1 on the numeric scale), while students entered for the Extended curriculum can achieve grades from A* to E (or 9 to 2). This means that choosing the Extended tier is necessary for students targeting the highest grades.
How IGCSE Results Support University and Next-Stage Admission
IGCSE results are widely accepted by universities and educational institutions around the world. They serve as a recognised indicator of academic readiness and are frequently used as part of the admissions process for pre-university programmes such as A-Levels, the International Baccalaureate Diploma, and other senior secondary qualifications.
For competitive university programmes, admissions offices often expect to see strong IGCSE results, with grades at A or A* (or 7, 8, and 9 on the numeric scale) in relevant subjects. Even when IGCSE grades are not a formal entry requirement, they provide universities with evidence of a student’s foundational knowledge and ability to succeed in demanding academic environments.
Cambridge and other examination boards have confirmed that students applying with A* to G grades are not treated differently from those applying with 9 to 1 grades. Both scales are considered equivalent in university admissions decisions, ensuring that no student is disadvantaged by the grading format their school uses.
Frequently Asked Questions About the IGCSE Curriculum
What is the IGCSE curriculum?
The IGCSE curriculum is a two-year international academic programme for students aged 14 to 16. It is developed and administered by Cambridge Assessment International Education and is recognised in more than 150 countries. The programme offers a broad range of subjects with both Core and Extended tiers, providing flexibility to accommodate different learning abilities.
How many IGCSE subjects should a student take?
Students typically take between five and nine IGCSE subjects. Most universities and post-secondary institutions require a minimum of five subjects, including English and Mathematics. The exact number depends on the school’s requirements and the student’s individual academic goals.
What is the difference between Core and Extended in the IGCSE?
The Core tier covers essential content and allows students to achieve grades from C to G. The Extended tier includes all Core material plus additional advanced content, with grades available from A* to E. Students aiming for top grades or planning to continue to A-Levels or the IB Diploma should generally sit for the Extended tier.
How does the IGCSE grading system work?
The IGCSE uses two grading scales. Cambridge IGCSE primarily uses the A* to G letter scale, while Pearson Edexcel International GCSE uses the 9 to 1 numeric scale. Both scales are recognised internationally, and universities treat them as equivalent for admissions purposes.
Can IGCSE students transition to other international programmes after completing their exams?
Yes. IGCSE results are accepted as a foundation for a wide range of post-secondary pathways. Many students progress to A-Levels, the IB Diploma Programme, or other internationally recognised qualifications such as the Ontario Secondary School Diploma (OSSD). The breadth and rigour of the IGCSE curriculum prepare students well for the demands of advanced study.
How can schools integrate an additional international programme alongside the IGCSE?
Schools that already offer the IGCSE curriculum can strengthen their academic offerings by partnering with international education providers to deliver complementary programmes. For example, Rosedale International Education works with partner schools around the world to deliver the OSSD programme alongside existing national and international curricula. This approach allows students to benefit from multiple recognised qualifications without leaving their local school.
Take the Next Step: Explore the OSSD Programme with Rosedale
The IGCSE curriculum provides students with a strong academic foundation, equipping them with critical thinking skills, subject-specific knowledge, and internationally benchmarked qualifications. For school owners and parents looking to build on that foundation, the next step is choosing a post-secondary pathway that is equally rigorous and globally recognised.
The Ontario Secondary School Diploma (OSSD), delivered through Rosedale Global High School, offers exactly that. Rosedale partners with schools worldwide to deliver a transformative OSSD programme that emphasises higher-order thinking skills, differentiated instruction, and personalised learning paths. Students who complete IGCSE subjects are well prepared to continue their studies within the OSSD framework and graduate with a qualification accepted by leading universities across the globe.
Rosedale’s collaboration model allows partner schools to integrate the OSSD programme alongside their existing curriculum, providing students with access to more than 50 university-bound courses delivered through a digital learning platform supported by comprehensive teacher development resources.
Whether you are a school owner exploring ways to enhance your institution’s academic offerings or a parent seeking the best possible pathway for your child after IGCSE, Rosedale International Education is ready to help.
Contact Rosedale today to learn more about partnership opportunities and how the OSSD programme can complement your school’s IGCSE curriculum.
