This 8+8 page Essentials worksheet and answer key focuses on set operations- Review set notation and symbols, element, empty set, subset, combination of two or more sets- Set Operation: compliment, union, intersection- Cross prodcutsEssentials worksheets give students review, guided, and independent practice in preparation for assessment, remediation post-assessment, and as a supplemental resource for RTI - response to intervention. The worksheets can be used in the classroom or as homework and