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http://collection.edu.ru/default.asp?ob_no=20980

http://www.school97.ru/metod/index.php?SECTION_ID=153&ELEMENT_ID=3389

http://victor-n-school.narod.ru/matematic.html

http://festival.1september.ru/articles/533440/

http://www.zavuch.info/component/mtree/zavuch-info/master-uchitel/nach-shk-konk/metod_razrab_urokov_matematiki_1kl.html

http://pedsovet.org/component/option,com_mtree/task,viewlink/link_id,16785/Itemid,118/