From the normative data provided in the Gates-MacGinitie test manual, we constructed the following table:

TABLE I

ESS SCORES CORRESPONDING TO THE AVERAGE SCORES OF STUDENTS AT THE BEGINNING OF EACH GRADE

Gates-MacGinitie Test

Norms for the Third Edition, Fall Administration

 Grade
Level and Test Form
 
 Level 1
Level 2
Level 3
Level 4
Level 5/6
Level 7/9
  Level 10/12
 
 K
  L
  K
 L
  K
 L
  K
 L
  K
 L
  K
 L
 K
 L
 1
  356  356  354  356                    
  2
  414  415  414  415                    
 3
      459  460  459  460  460  460            
 4
          488  489  488  488  490 488         
 5
              513  514  514 513   512 512    
 6
              535  536  536  536  536  535    
 7
                  558  556  557  557  555  557
 8
                  576  575  576  577  576  577
 9
                  587  590  589  590  590  590
 10
                      600  602  602 602
 11
                      619  619  618  619
 12 Fall
                      635  635  634 635 
 12 Spring                    643  644  643  644

You can read the table as follows: in the normative study, four tests were given to students in the fall of their first-grade year (Level 1, Form K; Level 1, Form L; Level 2, Form K, and Level 2 Form L). For those students, the ESS Scores corresponding to raw scores at the 50th percentile were 356, 356, 354 and 356, respectively, across the four tests. These scores are shown in line 1 of the table. Similarly, six tests were given to students in the second grade; these scores are shown in the line 2, and so on. The scores varied slightly across the tests within each grade. For the graphic display, we took the medians (underlined).