## Lesson: Ordered Pairs

Developing the Concept

Now that students have seen you graph points on the coordinate plane, it is time for them to try it. Be sure to have students use the proper vocabulary in explaining what they do.

**Materials:** overhead transparency or poster paper; grid paper and rulers for students

**Preparation:** Draw a coordinate grid on a transparency or poster paper.

Pass out grid paper with points *A* to *H* marked on them as shown on the grid below. (There are two points in each quadrant.) Put a transparency with the same grid on the overhead for the students to see. Point to points *A* and *F* as you ask the questions below.

**Wrap-Up and Assessment Hints**

Provide students with coordinate grids (Learning Tool 20 in the *Learning Tools Folder)* and have them work with a partner to locate points on the grid. Encourage them to challenge each other by providing pairs of *x-* and *y-* coordinates that alternate between positive and negative signs — for example (3, ^{-}5) and (^{-}3, 5). Have students label the points on their grids. Circulate to spot-check their answers.