The 8th billion baby
Number Sense Math and Social Studies Current events Ratio and Proportion Data and probability
  How fast is the world's population growing? Will the world's population size increase indefinitely?  Are all countries' populations increasing at the same rate? What are some of the f...
5.NBT 4.MD 5.MD 6.RP 6.SP 7.SP MP1 MP2 8.F 8.SP HSS 4.NBT HSSP