rtdlearning's most recent materials Here you can access the 20 newest materials of the GeoGebraTube user 'rtdlearning' Sat, 25 May 2013 05:45:52 +0200 Zend_Feed_Writer 1.12.0 (http://framework.zend.com) http://www.geogebratube.org The ELLIPSE Standard Form Tue, 08 May 2012 23:36:10 +0200 http://www.geogebratube.org/material/show/id/9201 http://www.geogebratube.org/material/show/id/9201 rtdlearning rtdlearning Conics - Ellipse Standard Form Tue, 08 May 2012 23:30:00 +0200 http://www.geogebratube.org/material/show/id/9198 http://www.geogebratube.org/material/show/id/9198 rtdlearning rtdlearning Horizontal and Vertical Stretches of the ELLIPSE Tue, 08 May 2012 23:19:41 +0200 http://www.geogebratube.org/material/show/id/9197 http://www.geogebratube.org/material/show/id/9197 rtdlearning rtdlearning