The following were among actions taken at the Nov. 24 meeting of the Howard County School Board. For more information, call 992-0500.

APTITUDE TEST SCORES -- The board heard a report from the school system's Office of Assessment that shows Howard County public school students' scores on standardized tests have improved for the eighth consecutive year -- and have remained above state and national average scores for the past three years -- on the Preliminary Scholastic Aptitude Test (PSAT), the Scholastic Aptitude Test (SAT) and Advanced Placement exams.

Howard County students last year had an average score of 970 out of a maximum 1600 on the combined verbal and math sections of the SAT -- an increase of seven points over the average county score last year. The average state score was 914 and the average score nationally was 906.

Howard County students' average SAT score was 462 on the verbal section and 508 on the math section, 32 points higher than the national average on each section.

On the Advanced Placement test, 80 percent of Howard County high school students had a score of three or better, compared with 68 percent of students nationally. Advanced Placement Tests, graded on a scale of 1 to 5, are offered in most subject areas. A score of three or better can qualify a student for college credit in the particular subject area.

On the PSAT last year, Howard County students scored 45.3 in the verbal section, 4.4 points higher than the national average and 50 in the math section, five points higher than the national average.

HAMMOND ELEMENTARY/MIDDLE SCHOOL ADDITIONS -- In a unanimous decision, the board voted to award a $3.6 million construction project at Hammond Elementary/Middle School to Carob Contractors Inc., a Greenbelt company. The project, scheduled to begin in mid-1988 and to be completed by the spring of 1989, will include a new roof, additions to the gym, an expansion of the music area, and installation of folding partitions.