With all the hype of the Triple Crown, it's a great time to bring it into the 3rd grade math classroom with regard to fractions.
This is also a great study guide for your class on identifying fractions (with step-by-step instruction and tips). No it is not too early to begin teaching the concept of fractions because it involves equal-sharing.
The study guide includes visual descriptions of basic fractions.
You will wonder why you hadn't thought about this sooner!