5 different 12 card sorts for determining if lines are Parallel, Perpendicular or Neither. Students first find the slopes of 2 lines then to determine if the lines are parallel, perpendicular or neither.

1 set uses points

1 set uses graphs of lines

1 set uses linear equations in slope intercept form

1 set uses linear equations in any form

1 set uses all 3 types

Can be used for differentiated instruction based on students abilities.

Includes: 5 sorts, 3 word walls/poster, 2 students answer sheets and answer keys