Jim Wilkerson of Silver Spring was declared the Bronze Medal winner as a member of the United States team at the Sixth World Spacemodeling Championship, held in Bulgaria. Wilkerson built a scale model rocket for this competition. He has been building models since age 10. Wilkerson is a senior majoring in aeronautical engineering at the Massachusetts Institute of Technology in Cambridge, Mass. He is the son of Marilyn Wilkerson of Silver Spring. 3 Named to Honor Society

Lynne Haggard, Helen Halterman, Teresa Merritt, Gerald Moneypenny and Sanil Nath were inducted into the National Honor Society at Newport Preparatory School. They were selected for membership in the society for high school students by a faculty council for meeting high standards of scholarship, service, leadership and character. Haggard is the daughter of Marcia and Gale Haggard of Silver Spring; Halterman is the daughter of Karen and William Halterman of Takoma Park, Merritt is the daughter of Sue and Walter Merritt of Bowie, Moneypenny is the son of Dr. Nancy and Dr. Marc Hafkin of Silver Spring, and Nath is the son of Devi Kutty and Dr. C.R. Nath of Silver Spring. Ride-On Cites Awards Drivers

Six operators of Montgomery County's Ride-On bus service recently received safe driving awards, $500 and a plaque for driving five consecutive accident-free years. They are Richard Braxton, Samuel Futrowsky, Rozellia Mahoney and Roy Morgan of the Gaithersburg Ride-On and Nathaniel Lytes and Efren Sanchez of the Silver Spring Ride-On. Cricket League Contestants Honored

Holton-Arms School students Tomoko Chizawa, 13, and Tiffany Elliott, 12, each won an honorable mention in the ages 10-to-13 category of the spring 1986

Cricket League Story Contest, in which contestants were asked to write a letter to any U.S. president.

"Almost every day I hear about how the homeless are always cold and being outdoors on freezing days, and I know it must hurt people to see it on the news," Elliott wrote to President Reagan. "I think you should give a little more time and consideration thinking about those poor people."

Chizawa also wrote to Reagan, saying, "After World War II, when Japan was a burnt-out area, the people of my grandparents' generation worked very hard to modernize Japan. So I would like you and Prime Minister Nakasone to be friends and do not fight." Chizawa, who came to the United States from Japan in 1983, is the daughter of Yasuko and Hauhiko Chizawa of Bethesda. Elliott is the daughter of Linda and Robert J. Elliott of Potomac.