The CDs were written, specifically, to "compliment" the limited material currently available from NFER, in there familiarization papers, that contain the 21 question types found in the Wirral 11+.
Remember, the NFER Practice Papers available for purchase on the high street only contain 15 question types.
The CD3 format is slightly different to the Wirral 11+, because it contains 100 questions per paper and the Wirral 11+ is an 80 question paper. We thought, for practice material, it would be useful for children to complete one paper that contains all 21 types of questions, rather than having to complete two 80 question papers. The 100 format allows parents to assess their childs ability in completing a paper with a variety of questions. Any problem areas can be quickly identified and CD1 can then be used for extra help.
The CDs are preparation tools, it is important that children, closer to the tests, are able to complete question papers in the correct format for the tests. The Tutors practice papers have been written for this purpose and can be downloaded from the site as e-papers or can be purchased in a printed version.
Hope this helps.