Book 1 assumes no functional number concepts and thus starts with the real meaning and vocabulary of one. Using a highly structured, multi-sensory cumulative system, pupils are lead through enjoyable activities to a firm grasp of the number concepts of one to nine. The ADDACUS^TM provides the beginnings of place value. We introduce addition and subtraction at the earliest stages as part of the concept of each number. Odd and even numbers and 'greater than' and 'less than' form a natural part of the process of understanding. The CD introduces mental arithmatic using number songs, rhymes and stories. By the end of Book 1, pupils should have a firm grasp of the numbers one to nine and their number bonds. They will also be able to recognise, read and write all the associated vocabulary. By providing the 'just right' challenge and guaranteed success at every level, this programme removes any fear which has been aquired through past misunderstandings.