This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
n coveropen. en student math journalvolume roarup everyday mathmatics National Sciece Associatiom The Univeraity of Chicago School Mathematics UCSMP Max Bell ISBN up yo versions PDold ESI Uncategorized February Original upload log bytes Tperkins no en student math journalvolume roarup everyday mathmatics National