This is quite basic, really aimed for year 1 or year 2 - adding more info would allow it to be adapted for older year groups, but it deals with the first voyage in a way that I think suits the younger classes.
Nice resource- however your information is wrong - Columbus did NOT discover America... The Vikings did. His journeys marked the beginning of further exploration but that is all... The last slide implies that he discovered it so you will want to alter that