Almost half of the parents of elementary school children in Prince George's County Public Schools have pledged their support for a program aimed at improving student grades through parental involvement in study.

Project SHARE (School and Home Accepting Responsibility for Education) encourages parents to set aside for themselves one half-hour four nights each week for creative reading or studying with their children.

During a recent recruitment drive, 27,724 parents representing approximately 48 percent of the school system's families signed written pledges to support the homework effort. When the progam began one year ago, it gathered pledges from 41 percent of the parents.

This year's recruitment, school officials said, reflects an increase of more than 2,000 parents of students in kindergarten through sixth grade, despite the decline in enrollment of more than 3,000 students in those grades.

Thirteen schools received parent participation rates of 80 percent or better. They are: Green Valley, 99.6 percent; J. Frank Dent, 99.1 percent; Allenwood, 94.6 percent; Bond Mill, 90 percent; District Heights, 88 percent; Tayac, 87.5 percent; Robert Frost, 87 percent; Concord, 84.9 percent; Parkway, 83 percent; Beltsville, 83 percent; Crestview, 82 percent; Brandywine, 80.7 percent, and Hollywood, 80 percent.