Practice:
https://mathbitsnotebook.com/Geometry/Quadrilaterals/QuadrilateralPropertiesQuiz%20(Web)/index.html
https://www.ixl.com/math/geometry/classify-quadrilaterals
https://www.proprofs.com/quiz-school/story.php?title=quadrilateral-quiz
http://www.mathwarehouse.com/geometry/quadrilaterals/classification-properties-quiz.php
https://mathbitsnotebook.com/Geometry/CoordinateGeometry/CGshowPractice.html (Coordinate Proofs)
Instruction:
https://www.sophia.org/concepts/classifying-quadrilaterals--2
https://learnzillion.com/lesson_plans/8855-identify-quadrilaterals-based-on-attributes