Commentary Bridge 9340 opened in 1967 and was the U.S. state of Minnesota’s third-busiest bridge, carrying 140,000 vehicles daily. Forty years later, the bridge collapsed during the evening rush hour without warning. Thirteen people died. An investigation by the National Transportation Safety Board determined that the collapse was the result of a math error made by the engineers who designed the bridge. When it comes to designing bridges, there is little room for error. Every calculation must be correct. Make one mistake and the whole thing might fail, as happened with Bridge 9340. Sadly, math is under assault by progressive educators who care more about being “woke” than being accurate. Earlier this year, the Oregon Department of Education sent an email to its teachers encouraging them to enrol in a virtual micro-course titled “A Pathway to Equitable Math Instruction.” The course’s 82-page guide tells teachers that equating mistakes with “wrongness” …