(Salem, OR)  --  The number of hours per school year will soon increase in Oregon.  The state Board of Education has approved a plan that will increase the number of hours for K-through-eight students to at least 900 per year.   Ninth-through-eleventh-graders will be required to attend school for at least 990 hours per year, and 12th-graders at least 966 hours per year.  Board of Education officials say the plan is a way to better prepare students for college.