Civil rights marches, how do you count a crowd?
Number Sense Geometry Math and Social Studies Holidays and Annual Events
  On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington.  This was 32 years after Martin Luther King, Jr. gave his histo...
Data and Probability estimation reasoning Martin Luther King Jr. Civil Rights MLK MP.4 6th 7th 8th HS 5th 4th 7.G.B 6.G.A 7.RP.A HSM 4.MD.A HSG.MG.A.2 Million Man March crowd counting