Imagine how difficult life would be if you couldn't count things, measure anything, do any calculations or be precise about time, distance or price. This series takes readers (Ages 8-12) on a historical journey, examining how people coped in the past and how they developed ingenious...
Imagine how difficult life would be if you couldn't count things, measure anything, do any calculations or be precise about time, distance or price.This series takes readers (Ages 8-12) on a historical journey, examining how people coped in the past and how they developed...