1 Do two rectangles that have the same area also have the same perimeter?
The following video clips were filmed in October 2011 at Chalimbana Basic School, Chalimbana, Zambia. They are from a Grade 7 lesson on rectangles. The lesson idea is available here: Properties of rectangles - perimeter and area.
1.2 Watch all clips
Use the "playlist" button in the top right or the "|<" and ">|" to skip through the playlist.
1.3 Choose a clip (and view more details)
|Video/Abel Clip 2.m4v||Whole class discussion on the meaning of area||Abel questions students on their knowledge and understanding of the concept of area.||3:08||Video/Abel rectangles||02||OER4Schools|
|Video/Abel Clip 3.m4v||Abel demonstrates that a circle has perimeter||Abel helps students to visualise the concept of perimeter of a circle and uses a cylinder to demonstrate how to calculate it.||2:23||Video/Abel rectangles||03||OER4Schools|
|Video/Abel Clip 4.m4v||Instructions for the interactive task||Abel starts with whole class dialogue, giving instructions for starting the investigation. (1:16) Abel then works with one of the groups, clarifying the concepts of area and perimeter, as well as how to work with these in Geogebra. The group is still stuck, and (3:30) Abel solicits helps from other students to help this group, asking them to explain details of Geogebra (relating to perimeter and area). (4:11) Students explore Geogebra through peer learning.||4:32||Video/Abel rectangles||04||OER4Schools|
|Video/New Abel clip 4.m4v||Students collaborate on GeoGebra investigation on area and perimeter||Introduction to group work, then students doing group work. The teacher supports students in group work, but the students find it difficult to follow the teacher's explanations. Towards the end of the clip, the teacher then asks some students to come over, to explain the issue to the group in their own words.||6:56||Video/Abel rectangles||05||OER4Schools|
|Video/Geogebra-group-interaction.m4v||Geogebra group work||A group of students jointly progress on their task to investigate the relationship between area and perimeter of rectangles.||2:03||Video/Abel rectangles||06||OER4Schools|
|Video/12 13 Abel 2 4 rectangles 1-desktop.m4v||Fixed area vs a changing perimeter||Abel demonstrates the concept of a fixed area vs a changing perimeter.||7:9||Video/Abel rectangles||07||OER4Schools|
|Video/12 13 Abel 2 4 rectangles 2-desktop.m4v||Student shares results of GeoGebra investigation||Abel elicits feedback from students about results of GeoGebra investigation on area and perimeter.||0:56||Video/Abel rectangles||08||OER4Schools|
|Video/Abel Clip 5.m4v||Students presenting work on area and perimeter||Students present outcome of findings of GeoGebra investigation on rectangles with the same area but different perimeters.||1:21||Video/Abel rectangles||09||OER4Schools|
|Video/12 13 Abel 2 4 rectangles 3-desktop.m4v||Have students changed their mind? Students vote.||Students reassess ideas about relationship between between perimeter and area following an investigation.||3:26||Video/Abel rectangles||09||OER4Schools|
|Video/Abel Clip 1.m4v||Interview with Abel on GeoGebra||In this interview Abel describes the use of GeoGebra for investigating area and perimeter.||0:55||Video/Abel rectangles||11||OER4Schools|
|Video/Abel Clip 6.m4v||Interview on interactivity||Abel speaks about the benefits of using interactive teaching in the classroom.||1:11||Video/Abel rectangles||12||OER4Schools|
|Video/12 13 Abel 2 4 rectangles 5-desktop.m4v||Group discussion on the formula for finding area of rectangle||Abel questions a group on the formula for area and how to relate it to a rectangle drawn on the netbook.||2:24||Video/Abel rectangles||15||OER4Schools|