Table 22. Percentage distribution of academic year 2009-10 ninth-graders, by years of planned high school mathematics and students' involvement in mathematics: 2009

Years of planned high school math
Students' involvement in mathematics One year   Two years   Three years   Four or
more years
Total  2.8 8.7 27.2 61.3

Participation in extracurricular math activities1
Yes 2.6 5.7 22.8 68.9
No 2.7 9.1 27.7 60.5

Mathematics achievement score2
Lowest quintile 8.3 16.6 33.3 41.8
Middle three quintiles 1.7 8.5 29.4 60.4
Highest quintile 0.5 ! 1.7 14.9 82.9

Self-identify as a math person
Strongly agree 2.1 3.0 17.2 77.7
Agree 1.8 7.1 25.1 66.0
Disagree 2.7 10.3 31.2 55.7
Strongly disagree 4.9 14.2 33.3 47.6

Seen by others as a math person
Strongly agree 1.9 3.5 16.7 77.8
Agree 1.3 7.3 24.7 66.6
Disagree 3.3 10.4 31.4 54.9
Strongly disagree 5.2 13.0 33.1 48.7

Understand math assignments
Never 10.8 20.1 23.7 45.4
Rarely 5.5 17.0 32.6 45.0
Sometimes 3.8 11.6 33.0 51.5
Often 1.1 4.8 22.4 71.6

Currently taking a math course
Yes 2.2 7.7 26.8 63.3
No 7.6 17.4 30.7 44.3
! Interpret data with caution. Estimate is unstable because the coefficient of variation (CV) for this estimate is 30 percent or greater (i.e., the standard error represents 30 percent or more of the estimate).
1 Math activities include math club, math competition, math camp, and math study groups or tutuoring.
2 Scores on a mathematics acheivement test were normalized to a mean of 50 and a standard deviation of 10. The scores were then divided into five quintiles (equal groups, each comprising 20% of the weighted population).
NOTE: Totals, student's sex, and student race/ethnicity are weighted by W1STUDENT and other variables are weighted by W1PARENT. Totals may not fall within the range of categorical values due to differential item nonresponse. Details may not sum to 100 percent due to rounding. The survey item on planned high school mathematics does not include a response option for less than one year. The question on planned years of high school mathematics includes the student's current year.
SOURCE: U.S. Department of Education, National Center for Education Statistics, High School Longitudinal Study of 2009 (HSLS:09), Base-Year.