Let It Snow!

Maxine Edwards and Mary Teal
The Center for Advancement of Teaching





Let It Snow!
Lesson Plan
Algebra 1 Level


Objective: To find the value of the slope of the line given two points. Student will observe the differences in lines with different slope values.

Engage: Demonstrate Dynamic Graphing using the CFX-9850G overhead. (Refer to 13-3 of the CFX-9850G manual for clarification.)

    Explore: Complete the following activity using the EA-100 and CFX-9850G:

    Equipment
    motion detector
    EA-100
    CFX-9850G
    data communication cable
    tape
    meter stick
  1. Perform experiment as follows:
  2. Retrieve the data from the EA-100:
    a. Connect EA-100 to CFX-9850G using the data communication link.
    b. Turn on CFX-9850G and choose Run (1) from the menu.
    c. Press SHIFT VARS {PRGM}
    d. Press F6 (>) , then I/O {F4}
    e. Press Recu (F4) {Receive( }
    f. Press OPTN, List {F1}, List {F1} ,1, close Parenthesis { ) }
    g. Press SHIFT EXE { }
    h. Press Recu (F4) {Receive( }
    i. Press OPTN, List {F1}, List {F1} ,2, close Parenthesis { ) }
    j. Press EXE
  3. The data should now be listed in List 1 and List 2.
  4. . For the next part of the procedure you will be operating in the STAT menu.
    a. After entering the STAT menu, you should find List 1 through List 2. Press GRAPH {F1}
    b. Press SEL {F4}
    c. StatGraph 1 : DrawOn
    d. EXIT
    e. Press SET {F6}
    Graph Type: xyline
    Xlist : List 1
    Ylist : List 2
    Frequency : 1
    Mark Type :
    Graph Color: CHOICE
    f. EXIT
    g. GRPH 1 {F1}

Explain: Introduce slope formula. Have students take 10 different pairs of data points throughout the graph (or table) and compute the slope for each pair. Discuss what might have caused students' graphs to differ within the graph and amongst each other.

Elaborate:Introduce slope formula. Have students take 10 different pairs of data points throughout the graph (or table) and compute the slope for each pair. Discuss what might have caused students' graphs to differ within the graph and amongst each other.
Evaluate Give students graphs of lines on a coordinate plane. Have students identify two points to find the slope of the line.

Developed by:
Maxine Edwards and Mary Teal
Butler High School Matthews, NC

additional help from:
Neal Farley
Independence High School
Charlotte, NC