How to Chart Test Scores
• List educational achievement tests that
have been repeated
• Log in percentile ranks on tests and
subtests
• Compute changes in percentile ranks
See Chapters 10 & 11 in
Wrightslaw: From Emotions to Advocacy
Woodcock Johnson
Standard Scores
1/90
5/91
Reading
97
Writing
87
Arith
115
Mean
100
94
92
105
100
10/92
90
91
97
100
6/95
78
84
95
100
Woodcock Johnson
Percentile Ranks
Reading
Writing
Arith
Mean
1/90
5/91
42
19
84
50
34
30
63
50
10/92
25
27
42
50
6/95
7
16
37
50
Woodcock Johnson
Standard Scores
120
100
80
Reading
Writing
Arith
Mean
60
40
20
0
Jan-90
May-91
Oct-92
Jun-95
Graph - Woodcock Johnson
Percentile Ranks
90
80
70
60
Reading
Writing
Arith
Mean
50
40
30
20
10
0
1/90
5/91
10/92
6/95
Graph - Woodcock Johnson
Percentile Ranks
90
80
70
60
Reading
Writing
Arith
Mean
50
40
30
20
10
0
1/90
5/91
10/92
6/95
Woodcock Johnson
Percentile Ranks - Reading
45
40
35
30
25
20
Reading
15
10
5
0
1/90
5/91
10/92
6/95
Woodcock Johnson
Percentile Ranks - Writing
30
25
20
15
Writing
10
5
0
1/90
5/91
10/92
6/95
Woodcock Johnson
Percentile Ranks - Math
90
80
70
60
50
40
Arith
30
20
10
0
1/90
5/91
10/92
6/95
Presentation
• One sheet of paper, data points
one inch in from upper left hand
corner, other one inch in from
lower right hand corner –
• Does this represent a slow down
hill slide, or did the youngster fall
off the cliff? Which?
Bell Curve - First Steps
This is not an easy topic, but it is not
rocket science either. You can master it.
Read Chapters 10 and 11 of From
Emotions to Advocacy 3 times!
First skim the two chapters.
Then re-read the two chapters and and
highlight key points.
Bell Curve – Mastery
Next, read the highlighted portions and
do the homework assignments at the
end of Chapter 11.
Draw the Bell Curve several times,
without referring to the book or your
notes.
Teach another person how to make a
freehand drawing of the Bell Curve.
PowerPoint -Explanation
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Create New File
New slide, click on chart format
Open the excel “datasheet”
Change the Title, Columns, Rows
Add the data, %’ile ranks, exit
datasheet
• Change colors of bars
• Make 4 copies of same slide
• Rename each, delete all but one row
SmartPhone APP
• PAR Assessment Toolkit
• SS, %’ile rank, z score, T score
• An APP for IPhone and Droids