Earlier this week, the D.C. Double the Numbers Collation launched a new website, doublethenumbersdc.org, featuring interactive tools and advice aimed at guiding D.C. students through the college application process. Many D.C. students are woefully uninformed about how to apply and pay for higher education, and a 2006 report found that only 9 percent of D.C. 9th graders graduate from college within five years of earning their diploma, less than half the national average. D.C.’s…