How many weeks, days, hours and minutes?

My reflection I had to work out how many days hours and minutes until the end of school using a hundreds chart. I think I did the working out bit well because I may have not got everything right but I think I am on the right track.The most challenging thing was to count up the minutes because all these number are flowing through your head and one mistake and you must restart so overwhelming. My next steps are to do this but from the beginning of the year.