(MENAFN- The Conversation) A shard of smooth bone etched with irregular marks dating back 20,000 years puzzled archaeologists until they noticed something unique – the etchings, lines like tally marks ...
A “rekenrek,” counting sticks, number blocks and other Math manipulatives I don’t have any love story to tell between myself and Math. This is one subject I dreaded the most when I was in school. So ...
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