Mercer Island High School is the only school in the world to have four students attain a perfect score on the spring 2017 AP exam in macroeconomics, according to the College Board.

All four students had the same teacher, Kim Schjelderup. Two are seniors this year, Zack Gottesman and Alex Mueller. Two graduated last June – Adam Tucker attends Yale University and Bryan Zhao attends UCLA. Tucker had two previous perfect AP scores in 2016 in calculus and microeconomics, and was one of only three students to get two perfect scores that year. Schjelderup was his teacher for those courses as well.

The College Board reported there were only 60 perfect scores on the 2017 AP macroeconomics exam, out of 142,137 students who took the test.

Gottesman and Mueller said their teacher deserves recognition for helping all four students achieve such a high level of success on the AP test. Both have taken multiple AP courses and said Schjelderup’s preparation and the practice tests beforehand made the difference.

“Alex and Zack are both exceptional students, as were Adam and Bryan who graduated last year,” said Schjelderup, who has taught at MIHS since 1994 and was the district’s 2016 high school teacher of the year. “I am just so proud of all of them for this accomplishment. It’s pretty amazing to have four perfect scores from one school.”