Work on describing quadrilaterals and identifying them too with your class. Here is a free printable bingo game to describe quadrilaterals. Do with unit rate slope etc
PBL idea for math: quadrilaterals
"Quadrilateral Robots" lesson is a great way to have fun teaching your students about quadrilaterals. There is a quadrilateral robot art project, a robot road game and high level thinking worksheets.
Idea ten--This is such a great anchor chart. It perfectly introduces the quadrilaterals by providing visuals and conceptual information. This can serve as a great way to lead into a geometry lesson on quadrilaterals.