IGCSE centres are places where you can sit your exams in order to achieve the desired grade. There are two kinds of exams: A-level and IGCSE. Cambridge exams are more popular and have different entry dates and exam board fees. IGCSEs are mainly divided into A-G grading systems, while Edexcel organises its exams in the same way as GCSEs. IGCSE centres are more important than GCSE centres, but they are not the only places that matter. The decisions made by the Ofsted inspections apply only to GCSE and A-level exams. Cambridge and Edexcel have made their own decisions for IGCSE examinations. This link
Are They Available to Home Educators?
The examination centres do not have to endorse the practicals to accept private candidates. But you must make sure you fully understand the practicals. Though you don’t need to actually do the practicals, you can watch videos of previous examinations to get the feel of how the practicals are done. It is still advisable to prepare for your practical exams, but not necessarily to sit the exams at an IGCSE centre. However, if you are unable to make it to a GCSE centre, you can always try taking a private route and study for the exam at home.
The IGCSE is widely accepted around the world, and some international schools offer it to facilitate transfer between countries. After completing their IGCSEs, students can continue their education in the UK. Some people also consider IGCSEs to be more difficult than GCSEs because they only include the examination at the end of the course, not coursework. In fact, recent changes in the format of GCSE have made this distinction less relevant.