Sentences are divided into two parts: the subject, which is who or what the sentence is about, and the predicate, which is everything else (verbs, adjectives, prepositional phrases, etc.). This collection of activity sheets uses short sentences and word prompts to help your students learn about the differences between subjects and predicates. The big read buttons, below, will be a godsend on those days that you tired. Answer keys really help a teacher go about their day. Grading is one of the most midless tasks in education.
A really quick way to remember this is if it is about the "who" or "what" you are referring to the subject. If it i something telling about the subject (who or what) it is the predicate.