This worksheet is a great example of an ABC Chart. It is really good for finding patterns, identifying function of behavior and proper ways to handle behavior. The website has other FBA worksheets organized by days of the week.
5 Steps to a Meaningful Behavioral Support: Step 2 Prioritize Behaviors - Autism Classroom Resources
BEHAVIOR OBSERVATION MADE EASY: FREQUENCY DATA COLLECTION FORM - TeachersPayTeachers.com