[b]The control button will only appear if you have changed something![\b][br][br][br]After the first tasks was controlled, and the assessment of percentages appear. This text is colored, depending on the rating. For a passed exercise you should have worked more than 20 tasks and a score over 80% have (pink text!).

Created with GeoGebra – [url=http://tube.geogebra.org/m/1422321]Birgit Lachner[\url]