We have been absolutely delighted with the courses provided by Echo Education and would not hesitate to recommend them. When my son was thirteen, he studied Biology and attained an A*. This past year, he gained another A* in Physics and two A’s in Chemistry and Human Biology. In fact, my son likes and trusts Echo so much that this year, he has chosen to study Geography and History with them even though they aren’t his favourite subjects! He just didn’t want a different provider. Echo are always extremely quick to respond to queries and their marking comments are thorough, encouraging, and helpful. They always point out areas that come up frequently in exams and may therefore need more careful attention.
Not only that, but in areas where my son needed help to understand a concept, the tutors wrote a personalised, detailed response to his queries. It really is an excellent service.
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.