11 | Add to Reading ListSource URL: physics.bk.psu.eduLanguage: English - Date: 2013-11-25 18:40:10
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12 | Add to Reading ListSource URL: www.scienceinschool.orgLanguage: English - Date: 2011-04-07 12:39:11
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13 | Add to Reading ListSource URL: fairbanksbest.comLanguage: English - Date: 2013-04-23 14:11:25
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14 | Add to Reading ListSource URL: cogcc.state.co.usLanguage: English - Date: 2003-08-19 11:58:01
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15 | Add to Reading ListSource URL: oklahomavirtualhighschool.comLanguage: English - Date: 2014-05-09 17:03:33
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16 | Add to Reading ListSource URL: www.advancekentucky.comLanguage: English - Date: 2014-07-02 13:23:04
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17 | Add to Reading ListSource URL: www.siemensscienceday.comLanguage: English - Date: 2013-03-06 17:01:49
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19 | Add to Reading ListSource URL: dpi.state.nd.usLanguage: English - Date: 2006-03-24 10:49:17
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