Geocoding with Google Drive

It is common to find spreadsheets with addresses or location information that would be useful to map.  The process of assigning latitude and longitude locations based on addresses is called geocoding.  One of many good resources for geocoding is Google MyMaps.  The webmap designed below used information on school schootings in Canada from Wikipedia, which were pasted into a Google Sheet and imported to Google Maps.  Whereas school shootings in the U.S. are widespread, only nineteen cases, beginning in 1884 are listed for Canada.  Clearly all information should be verified and validated before further study on the distribution of shootings.