Calendar Math Worksheets - Super Teacher Worksheets Ordinal numbers are used to show a position in a series. (examples: 1st, 2nd, 3rd, 4th, 5th, etc.) Elapsed Time Worksheets. Teach your students to calculate the passing of time with these elapsed time worksheets. Time (Clock) Worksheets. Practice reading analog clocks with these worksheets, games, and printable activities.