BoxStandard
 
 
2016 2015 2014 2013 2012
2011 2010 2009 2008 2007
2006 2005 2004 2003 2002
2001 2000 1999 1998 1997
1996 1995 1994 1993 1992
1991 1990      
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
     

standard

Make a ruler using elastic cord. Measure the same object by asking different people to take different measurements.