These collections use the pyramid shape as “concept illustrators” and convey that there is more to Number and ‘numbers’ than the conventional Number Line:

• “Digital Numbers” – the new concept changing from ‘decimal notation‘ to ‘digital composition‘;

• “Last Digit Series” – the Decimal Pyramid reveals Odd and Even characteristics;

• “SINGLE Last Digit Patterns” – the fascinating difference and uniqueness of the Odd Digits 1 3 5 7 9;

• “COMPOSITE Last Digit Patterns” – graphical patterns of combinations of digits 1 3 5 7 9;

• “Digital Prime Diagonals” – where do these Diagonals come from? What do they tell us?

NEXT: 2. “Digital TABLES”