The Oklahoma Heritage Association and Gaylord-Pickens Oklahoma Heritage Museum have announced details of the annual Heritage Week Competitions. Three contests are planned. Students in grades four through six can make posters depicting an Oklahoman. Students in grades seven through nine can write an essay about the importance of someone to his or her county history. Students in grades 10 through 12 can make a video documentary about a native Oklahoman and his or her affect on the state. Prizes of up to $350 in cash will be awarded for the top three winners in each age group. Winners also will be honored at a reception at the state Capitol. The deadline is 5 p.m. Oct. 26. Entries should be sent to the Gaylord-Pickens Oklahoma Heritage Museum, 1400 Classen Drive, Oklahoma City, OK 73106. For rules and entry forms, call 523-3202 or go to www.oklahomaheritage.com.