Yes
archaology helps us today by showing us the past of ancient civilizations
it helped us because they past down their traditions
There various ancient civilizations that most affect US culture today. Some of them include ancient Greek, ancient Roman, Mayan and so many others.
As you have not told us what the 'previous lessons' were, we can't help you.
Of all the civilizations of the world the one that had the most impact on the language, culture and customs of the US was Britain. This is primarily due to the use of English and that most Americans that moved to America were of English decent.
The three civilizations commonly referred to as "The Classical Civilizations" are the Mediterranean, Indian, and China Civilizations.
It told us that they didn't know how to use any other building material than rock.
You did not give us any following statements.
mound builders,inuit,and anasazi
mound builders,inuit,and anasazi
mound builders,inuit,and anasazi
One common example would be the Mayans. They invented the 365 day calendar.