How GCSEs in Wales and England are starting to change
The GCSE results in Wales are out on Thursday.
Performance for the grades A* to C has been the same for the last two years with 66.6% of exam entries falling into this top band.
But the exam system is getting more complicated, reforms are on the way - and it will not be as straightforward from next year when making comparisons, especially with other UK nations.
A whole set of new GCSEs are being introduced in Wales as part of reforms, while from 2017, the way grades are awarded will change completely in England.
Video by Sophie Mutton