April 18, 2011
First and second graders built the balance beam in the green B instructions for the simple motorized machine sets.
Then they figured out many combinations of blocks and positions that balanced.
1 X 6 = 2 X 3
Number of blocks times the distance from the middle on one side
equals
the number of blocks times the distance from the middle on the other side.
1 X 16 = 2 X 8
To get larger numbers they used the idea from the Green A instructions
for making longer beam
by sandwiching them between two plates.
6 + 6 + 6
is 9 + 9
3 X 6 = 2 X 9
http://netapps.marshall.edu/lego/lessonplans/BalanceScale/BalanceScale.html
http://netapps.marshall.edu/lego/CCE0708/02Ap08CCE/02Ap08CCE.html
http://netapps.marshall.edu/lego/VOB0708/02Ap08VOB/02Ap08VOB.html
http://netapps.marshall.edu/lego/StJoe0910/26Feb2010StJoe/26Feb2010StJoe.html
http://netapps.marshall.edu/lego/Southside1011/2011-01-19SSEK/2011-01-19SSEK.html
