For ELS class, I used these worksheet for self-checking of ordinal numbers. Before this worksheet I gave ordinal numbers and cardinal numbers handout to my students first.
1. Practice for ordinal and cardinal numbers
2. Rules of ordinal
For ESL class. I made 10 questions for teaching ordinal numbers. These questions make students understand ordinal numbers. When they learn just ordinal numbers, it's hard to say them.
These 10 questions can be used for the the icebreaking activity