One of the important differences between previous educational qualifications (and the earlier grading of A-levels) and the later GCSE qualifications was supposed to be a move from norm-referenced marking to criterion-referenced marking.  On a norm-referenced grading system, fixed percentages of candidates achieve each grade. With criterion-referenced grades, in theory, all candidates who achieve the criteria can achieve the grade. A comparison of a clearly norm-referenced assessment, such as the NFER Cognitive Ability Test or CAT, with GCSE grading seems to show an unexpected correlation, which challenges the idea that the GCSE is a properly criterion-based assessment. 
We’ll be honest, there’s a lot of ground to cover before you walk into the exam hall (gulp) and it’s not the kind of stuff you can learn all in one night (if only you could!). The good thing is, we’re on your side and we’re ready to help you get prepared for your GCSEs. Forget mindlessly looking through Science textbooks. With Education Quizzes, you can start engaging in revision you’ll actually enjoy! With our quizzes, you’ll get quick fire questions on important topics and you’ll be able to test your own knowledge. We’ll also give you an explanation of each answer so you can learn from your mistakes. We think you’ll find it’s a much more fun way to revise!