In linguistics, ordinal numbers are the words representing the rank of a number with respect to some order, in particular order or position (i.e. first, second, third, etc.). Its use may refer to size, importance, chronology, etc. In English, they are adjectives. They are different from the cardinal numbers (one, two, three, etc.) referring to the quantity. Ordinal numbers are alternatively written in English with numerals and letter suffixes: 1st, 2nd or 2d, 3rd or 3d, 4th, 11th, 21st, 101st, 477th, etc. In some countries, written dates omit the suffix, although it is nevertheless pronounced. For example: 4 July 1776 (pronounced "the fourth of July ... "); July 4, 1776, ("July fourth ..."). When written out in full with "of", however, the suffix is retained: the 4th of July.
Ordinal numbers are slightly more challenging for students so for more practice consider using one or more of the 45 ordinal numbers worksheets on this page. It is important to relate ordinal numbers to their cardinal counterparts especially when the connection is not obvious for example one and first. Here is a jumbled words activity where students practice spelling ordinal numbers and matching the words with the numbers. The worksheet is cute and would be good for groups of young students; for high school or adult students, you may want to choose a different design or a different worksheet altogether. If you successfully used an activity to teach students cardinal numbers, you may decide to use the same one to practice ordinal numbers too. For more teaching ideas, take a moment to read the article How to Teach Ordinal Numbers and if you have time, upload any worksheets you have on this topic to this page so that other busy teachers can learn from you.