<a href="http://billkerr2.blogspot.com/2009/09/shape-31.html">http://billkerr2.blogspot.com/2009/09/shape-31.html</a><div><br></div><div><a href="http://billkerr2.blogspot.com/2009/09/shape-31.html"></a>"<span class="Apple-style-span" style="font-family: Georgia, serif; font-size: 13px; color: rgb(51, 51, 51); line-height: 20px; ">So, I realised this was a nice challenge in real maths and understanding of the application of variables, measurement, ratio, proportion and fractions"</span><br>
<div><br></div><div><a href="http://billkerr2.blogspot.com/2009/09/shape-31.html"></a>I see this as a good example of where constructionist methods are necessary and instructionist or conventional textbook methods could not work
</div><div><br></div><div>In Bruner's terms it would be a matter of finding an honest child's version of such puzzles all the way down to primary age levels</div></div>