Hey Teachers! Here you have a new resource for your class. You can use this material as display posters for your classroom or for your math explanations. It is important that our students can distinguish between cardinal and ordinal numbers. A cardinal number is what is normally referred to as a counting number, some examples are: one, two, three and four. An ordinal number is a number defining the position of something in a series, such as ‘first’, ‘second’, or ‘third’.