Once students are comfortable rearranging linear equations from standard form to slope-intercept form, this is a great review activity. Students can play in groups of 4. Place all of the playing cards, cut out, face down on the table. Each student gets a game board. Then turn one card over and work out the slope-intercept form as a group. The solution will be somewhere on every game board. Place a marker on the solution. First person to connect four wins.