This is a hands-on lines and angles activity (parallel, perpendicular, acute, obtuse, etc.) that seems to work for struggling students. It helps the students to visualize and synthesize lines and better see lines relationships. You will need blue, black, red, green and brown yarn. in my class, we let the students measure out and cut their yarn.
Print out the document double-sided onto cardstock, though I assume it could be used on regular paper as well.