Over the past 20 years of teaching at Haaff Elementary in Pueblo, Angie Casados noticed a steady decline. It wasn’t a drop in grades or lack of care from students, but rather a battle with holding ...
In the third century BCE, Apollonius of Perga asked how many circles one could draw that would touch three given circles at exactly one point each. It would take 1,800 years to prove the answer: eight ...
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