http://www.k5learning.com/sites/all/files/sample_lessons/Data%20Analysis%20Lineplots%20L3%20V1%20T1a/Data_Analysis_LinePlots_L3_V1_T1a.swf
http://www.learnalberta.ca/content/me3us/flash/lessonLauncher.html?lesson=lessons/15/m3_15_00_x.swf
http://mrnussbaum.com/grade_2_standardslinegraph/
http://studyjams.scholastic.com/studyjams/jams/math/data-analysis/line-plots.htm
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