NLVM: http://nlvm.usu.edu/en/nav/vlibrary.html
From 3-5 Number and Operations
Place Value
Base Blocks: http://nlvm.usu.edu/en/nav/frames_asid_152_g_2_t_1.html
See addition, subtraction, and decimals with other Base Blocks links
Fractions –Basic
Parts of a Whole: http://nlvm.usu.edu/en/nav/frames_asid_102_g_2_t_1.html?from=category_g_2_t_1.html
Naming: http://nlvm.usu.edu/en/nav/frames_asid_104_g_2_t_1.html?from=category_g_2_t_1.html
Visualizing: http://nlvm.usu.edu/en/nav/frames_asid_103_g_2_t_1.html?from=category_g_2_t_1.html
Fractions – Equivalent and Comparing
Equivalent Fractions: http://nlvm.usu.edu/en/nav/frames_asid_105_g_2_t_1.html?from=category_g_2_t_1.html
Comparing Fractions: http://nlvm.usu.edu/en/nav/frames_asid_159_g_2_t_1.html?from=category_g_2_t_1.html
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