U.S. high school students match their peers in other nations when it comes to math skills. But ask them to apply those skills to real-world situations and things begin to look a bit bleak, a new study suggests. The nation’s 15-year-olds make a poor showing on a newly released international test of practical math applications, ranking 24th out of 29 industrialized nations, behind South Korea, Japan and most of Europe. U.S. students’ scores were comparable to those in Poland, Hungary and Spain.