I cannot remember the exact place I aquired this activity – I’m thinking its CORD related from years back.
Students create a 20 x 20 Quadrant I coordinate system using string and the tiles on the floor.
In small groups, they are given their shipping lane equation and 3 enemy lane equations. When each system is solved, they place a “mine” on the coordinate solution. When all groups have plotted their mines, we graph the enemy lanes – using 2 points from the line.
Happy to say all groups earned at least 3’s on the completion of their task. It was simple implement, a quick review and students said it was fun.
It was an opportunity for students to share different methods for solving systems, ranging from putting in slope-intercept form and using graphing calculator, substitution and elimination – they verified their work by comparing with others within the group. The group had to come to concensus on where to place the mine (solution). Conversations were great – when there was a disagreement, I observed them looking for mistakes, explaining to their teammate how to correct. Almost everyone was fully engaged in the activity
Self-assessment was simple – if it wasn’t a direct hit, the group needed to revisit their work. During our debriefing, group mistakes ranged from a simple mis-plot on the grid; using the y-coordinate for the x when finding the second coordinate; simple arithmetic – forgot to divide by the coefficient; The groups who had to revisit their work – were able to explain how to correct their work.
4 – All 3 systems are solved correctly, mines are plotted correctly, to result in direct hits.
3 – All systems are solved correctly, but a misplot results in an almost hit.
2 – one of the systems contains errors in solution.
1 – 2 of the systems contain errors in solution.