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22![Iowa Science Teachers Section Iowa Academy of Science September 15, 2007 Nadine Weirather, Editor Iowa Science Teachers Section Iowa Academy of Science September 15, 2007 Nadine Weirather, Editor](https://www.pdfsearch.io/img/29cea6a03c3f5e045ca440d926ac5a9a.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:31
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23![Iowa Science Teaching Section • Iowa Academy of Science May 15, 2010 Iowa Science Teaching Section • Iowa Academy of Science May 15, 2010](https://www.pdfsearch.io/img/14b887976ef7d9dc488bce7b31acf91f.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:42
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24![](https://www.pdfsearch.io/img/71ffbeb28defc8600ec1764108ed08c2.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2013-02-21 09:46:28
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25![Iowa Science Teachers Section of the Iowa Academy of Science Iowa Science Teachers Section of the Iowa Academy of Science](https://www.pdfsearch.io/img/4528d3f9a387c66175601f7b924b6036.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:20
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26![Iowa Science Teaching Section • Iowa Academy of Science September 15, 2009 Iowa Science Teaching Section • Iowa Academy of Science September 15, 2009](https://www.pdfsearch.io/img/f3ea64cad209831f6fa081a0415b0892.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:40
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27![Iowa Science Teaching Section • Iowa Academy of Science September 15, 2008 Iowa Science Teaching Section • Iowa Academy of Science September 15, 2008](https://www.pdfsearch.io/img/0573356a2adc703e9ed83e83081dfbc2.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:34
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28![Iowa Science Teaching Section • Iowa Academy of Science November 15, 2008 Iowa Science Teaching Section • Iowa Academy of Science November 15, 2008](https://www.pdfsearch.io/img/61190103c82e3db9d2ff9c2818e05126.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:33
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29![Iowa Science Teaching Section • Iowa Academy of Science February 15, 2009 Iowa Science Teaching Section • Iowa Academy of Science February 15, 2009](https://www.pdfsearch.io/img/b2e477143475edb0cae2bd0e3b661bec.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:37
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30![Iowa Science Teachers Section Iowa Academy of Science November 15, 2007 Nadine Weirather, Editor Iowa Science Teachers Section Iowa Academy of Science November 15, 2007 Nadine Weirather, Editor](https://www.pdfsearch.io/img/086834324baaa1f53781836deee75431.jpg) | Add to Reading ListSource URL: www.iacad.orgLanguage: English - Date: 2011-06-08 10:19:29
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