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  1. Constants, Units, and Uncertainty - National Institute of Standards and Technology (NIST)
    A reference with three sections: Fundamental Physical Constants (values of the constants and related information, and a searchable bibliography on the constants); the International System of Units (in-depth information on the SI, the modern metric system), and guidelines for the expression of uncertainty in measurement. more>>

  2. How Many? A Dictionary of Units of Measurement - Russ Rowlett; University of North Carolina at Chapel Hill
    A dictionary of both metric (SI) and English measurement units, with history, links to related sites, and a bibliography. more>>

  3. Introduction to Measurement for Primary Students - Varnelle Moore
    A Web unit designed designed to engage young children in a series of activities where they measure and describe the attributes of integer bars: building houses, short vs. tall, designing bridges, measuring using integer bars. Each lesson includes an interactive, manipulative-based project, technology, paper/pencil practice, and literature connections. Helpful links and teacher support extension ideas are also provided. more>>

  4. A Tour of Measurement - Math Forum
    A central resource for people teaching and learning about measurement. For teachers there are links to lessons and materials, questions and answers from Ask Dr. Math, and recommended software, grouped by level (elementary, middle school, high school). For students there are general reference materials and questions and answers from the Dr. Math archives. more>>


 

Mason error

error in file:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm
 
line 79:  Bizarre copy of ARRAY in aassign
context:  
... 
75:  # them according to the format variables defined earlier in
76:  # this file and join them onto the $sub sub-routine string
77:  if ($hargs) {
78:  # we may trash some of the args so we take a copy
79:  @a = @DB::args; # must get local copy of args
80:  # don't print any more than $MaxArgNums
81:  if ($MaxArgNums and @a > $MaxArgNums) {
82:  # cap the length of $#a and set the last element to '...'
83:  $#a = $MaxArgNums;
... 
component stack:   /library/branch.html
/library/dhandler
code stack:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm:79

debug info:   Debug file is '/var/lib/mason/debug/anon/3'.

raw_error





























raw error:
 






























error while executing /library/branch.html:
Bizarre copy of ARRAY in aassign at /usr/lib/perl5/5.6.0/Carp/Heavy.pm line 79.