Perimeter and area
Lesson idea. The lesson idea is about a mathematics investigation, where students explore whether two rectanges that have the same area also have the same perimeter. This is of course not the case, but nevertheless it can be a misconception. Students initially vote, then do an investigation, and finally vote again as well as present their conclusions. The investigation offers an opportunity for sametask group work.
Teaching approach. A problem to inspire higher order^{(ta)} questioning^{(ta)} especially in whole class^{(ta)} dialogic teaching^{(ta)} encouraging pupils to engage in mathematical thinking^{(ta)} and language^{(ta)}. You could use Geogebra^{(tool)} in this investigation, as an example of sametask group work^{(ta)}. ^{(edit)}
Resource details  
Title  Exploring properties of rectangles: Perimeter and area. 
Topic  [[Topics/AreaArea]], [[Topics/PerimeterPerimeter]], [[Topics/PolygonsPolygons]] 
Teaching approach  [[Teaching Approaches/Higher orderHigher order]], [[Teaching Approaches/QuestioningQuestioning]], [[Teaching Approaches/Whole classWhole class]], [[Teaching Approaches/Dialogic teachingDialogic teaching]], [[Teaching Approaches/Mathematical thinkingMathematical thinking]], [[Teaching Approaches/LanguageLanguage]], [[Teaching Approaches/Group workGroup work]]

Subject  [[Resources/MathsMaths]] 
Age of students / grade  [[Resources/SecondarySecondary]], [[Resources/PrimaryPrimary]] 
Additional Resources/material needed 

Files and resources to view and download  Questions to investigate:

Acknowledgement  This resource was contributed by Bjoern Hassler. 