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           2009 AMC8 Report for all schools in Colorado                

           Number of schools returning results       31
           Average of school highest score        16.71
           Average school team score              42.90

           # of State Student Participants         1506
           Overall State Average Score             9.60

                       Average Score by Grade level

                   Grade         # of Students  Average

                    5th              79           8.11
                    6th             235           8.92
                    7th             494           9.37
                    8th             680          10.20



           Number of Female Students                703
           Average Score of Female Students        9.28

                       Average Female Scores by Grade

                   Grade         # of Students  Average
                   5th               36           7.86
                   6th              106           8.49
                   7th              227           9.10
                   8th              326           9.80



           Number of Male Participants              769
           Average Score of Male Participants      9.91

                       Average score for Males by Grade

                   Grade         # of Students  Average
                   5th               42           8.40
                   6th              126           9.30
                   7th              255           9.63
                   8th              342          10.56




                     2009 American Mathematics Contest  8
                   Number of Students Achieving Indicated Score



                 SCORE        MALE       FEMALE       TOTAL*
                  25
                  24            2                         2
                  23            2                         2
                  22
                  21            1                         2
                  20                         1            1
                  19            6            4           10
                  18            5            4           10
                  17           13            9           22
                  16           15           11           26
                  15           29           16           45
                  14           47           31           79
                  13           49           47           96
                  12           65           47          113
                  11           74           52          132
                  10           88           90          187
                   9           85           80          168
                   8          110           92          205
                   7           55           83          141
                   6           60           54          115
                   5           28           38           70
                   4           15           27           42
                   3           15           13           28
                   2                         3            3
                   1
                   0  (@)                    1            1
                   0  ($)       5                         6



           (@)  These students attempted some of the problems
           ($)  These students attempted none of the problems
           (*)  Total includes students who failed to mark their gender

                         2009 American Mathematics Contest  8
                             Number of Students by Grade
                              Achieving indicated Score



            SCORE   5th Grade    6th Grade    7th Grade    8th Grade
              25
              24                                    1            1
              23                                                 2
              22
              21                                    1            1
              20                       1
              19          1                         4            5
              18                       3            2            5
              17          1            3            7           10
              16                       7            8           11
              15          1            6           11           27
              14          3            8           27           41
              13          4           11           38           43
              12          3           13           33           64
              11          6           12           34           76
              10          5           23           63           93
               9          6           27           57           77
               8         10           31           62          100
               7         12           31           39           56
               6         10           25           41           39
               5          9           13           28           17
               4          3           14           17            8
               3          3            6           15            3
               2                                    3
               1
               0(@)       2            1            3            1
               0($)



           (@)  These students attempted some of the problems
           ($)  These students attempted none of the problems

           Note:  Some students failed to indicate a grade





                         2009 American Mathematics Contest  8
                             Number of Schools with 3+ students
                              Achieving team Scores



            SCORE   school count
              66          1
              60          1
              57          1
              55          1
              54          1
              53          1
              52          1
              50          1
              49          3
              46          1
              45          1
              44          2
              42          2
              41          2
              40          1
              39          1
              38          1
              36          2
              35          1
              34          1
              32          1
              24          1







                   Table of Item Difficulty for the 2009
                      American Mathematics Contest  8
                 Tabulation of responses by    1506 Students
                             Percent of Responses


    ITEM    A         B         C         D         E       OMITS       ?
    ____  _____     _____     _____     _____     _____     _____     _____

      1    0.13      0.07      2.19      1.73     95.42*     0.46      0.00
      2    2.39      3.85      3.45     87.45*     2.12      0.73      0.00
      3   12.08      2.79     81.08*     1.93      1.66      0.46      0.00
      4    8.76     68.79*     2.59      8.70     10.09      1.00      0.07
      5    4.65     15.94     17.60     54.91*     5.11      1.79      0.00
      6   63.08*    10.42      9.56      5.58      9.30      2.06      0.00
      7    3.32      7.57     35.99*    20.85     28.35      3.78      0.13
      8   28.55     19.59*    42.43      3.32      4.71      1.26      0.13
      9   15.54     38.45*    19.32     15.87      7.30      3.52      0.00
     10    2.92     27.56     15.21     45.62*     7.44      1.13      0.13
     11    6.77     16.67     25.23     28.02*    17.66      5.64      0.00
     12   19.06     25.90      4.58     39.64*     8.17*     2.52      0.13
     13    8.03     74.30*     5.78      7.24      1.79      2.86      0.00
     14    3.98      8.03*    75.83      4.52      3.25      4.32      0.07
     15   16.47     12.22     17.80     27.03*    19.52      6.91      0.07
     16   32.54     18.19     16.47     12.28*    12.95      7.57      0.00
     17   17.60     20.52*    23.24     16.60     11.82     10.23      0.00
     18   25.10     10.42     34.20*    12.62      9.50      8.10      0.07
     19   11.89     14.94     18.13     17.86*    25.63     11.22      0.33
     20   17.46     29.95     10.42     18.06*    12.08     12.02      0.00
     21   15.21     33.40     14.81     14.81*     6.37     15.27      0.13
     22   10.49     12.15     17.33     20.98*    24.24     14.74      0.07
     23    9.30     24.90*    17.13     20.72     10.69     17.07      0.20
     24   15.87     18.13     21.71     15.01      9.69*    19.26      0.33
     25   13.41     17.73     13.68     15.21     19.46*    20.52      0.00


   (*)  Correct Response

   (?)  Response the computer was unable to read due to incomplete
        erasures or two answers marked for the same problem