Can you Count in Greek? Or, in any other ancient language? Most likely you are somewhat familiar with Roman Numerals. This book, however, gives lessons for 11 different ancient number counting systems.
What is great about this book is that it doesn't just teach counting, but how to calculate using the ancient systems.
There is an introduction to each system of counting. Then, the student has opportunity to translate from the ancient language to English as well as from English to the ancient language. Followed by practice calculating with each of the systems.
My son, said that the hardest part was the calculations but the funnest part was the translations.
This book would also be ideal for anyone studying ancient history to incorporate math into a complete unit study.