Micro 2015 #1 Scoring Rubric:  https://secure-media.collegeboard.org/digitalServices/pdf/ap/ap15_microeconomics_sg.pdf
Micro 2010 #1 Scoring Rubric:  https://secure-media.collegeboard.org/apc/ap10_microeconomics_scoring_guidelines.pdf
Micro 2008 #1 Scoring Rubric:  https://secure-media.collegeboard.org/apc/ap08_micro_econ_frq.pdf

Scoring Guidelines

Unit 3:  Perfect Competition