Definitions of STANDARD: From http://www.merriam-webster.com/dictionary/standard .....3: something established by authority, custom, or general consent as a model or example : criterion standards; 4: something set up and established by authority as a rule for...
Lucinda Mackinnon is a certified Math Teacher with 22 years experience in Texas classrooms and 4 years experience running her private math tutoring business, Math-Matters.org.
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