second interlude
Channel: AssocTeachersMaths
Date: 20/10/2014

This is a short Geogebra presentation (approx 7 minutes long) .   A nine pin board is based upon making areas of, at maximum, four square units.  This task takes the idea of 'constant area four'.  Triangles, trapezia, parallelograms and amalgams of squares in different orientation all come into to play and this video shows this using Geogebra.

The activity is from the ATM publication Exploring Area and Fractions with a Square Geoboard. The book includes a sequence of tasks that develop a deep conceptual understanding of area and fractions and encourage the learner to reason, explore and go boarder and deeper into these ideas.