Submit ONE Google sheet with different sheets exploring the data sets linked below. Some example visualizations are below - yours don't have to (and shouldn't) be the same - explore for yourselves. I recommend leaving the Decimal Mark data until last, as it requires the most data processing work.
In the Australian population example, I chose to represent population as the size of the dot and the percentage change of population as red-to-green)
Australian State Population (size) and changes in population (colour) - 2017 version
World Population Density
# Data from https://en.wikipedia.org/wiki/Decimal_mark#Hindu.E2.80.93Arabic_numeral_system# Date retrieved 2017-10-17# Countries that use Hindu-Arabic numerals and a Decimal Point AustraliaBangladeshBotswanaBritish West IndiesBruneiCambodiaCanadaChinaMacauDominican RepublicEgyptEl SalvadorGhanaGhanaGuatemalaHondurasIndiaIrelandIsraelJapanJordanKenyaKorea, NorthKorea, SouthLebanonLuxembourgMalaysiaMaldivesMaltaMexicoMyanmarNepalNew ZealandNicaraguaNigeriaPakistanPalestinePanamaPhilippinesPuerto RicoSingaporeSri LankaSwitzerlandTaiwanTanzaniaThailandUgandaUnited KingdomUnited StatesZimbabwe# Countries that use Hindu-Arabic numerals and a Decimal CommaAlbaniaAlgeriaAndorraAngolaArgentinaArmeniaAustriaAzerbaijanBelarusBelgiumBoliviaBosnia and HerzegovinaBrazilBulgariaCameroonCanadaChileColombiaCosta RicaCroatiaCubaCyprusCzech RepublicDenmarkEast TimorEcuadorEstoniaFaroesFinlandFranceGermanyGeorgiaGreeceGreenlandHungaryIcelandIndonesiaItalyKazakhstanKosovoKyrgyzstanLatviaLebanonLithuaniaLuxembourgMacauMacedoniaMoldovaMongoliaMoroccoMozambiqueNamibiaThe NetherlandsNorwayParaguayPeruPolandPortugalRomaniaRussiaSerbiaSlovakiaSloveniaSouth AfricaSpainSwedenSwitzerlandTunisiaTurkeyUkraineUruguayUzbekistanVenezuelaVietnam Not the best design choices!!
CF Same map on Wikipedia (retrieved 2019)