After a year of remote algebra, Diego Fonseca struggled with advanced algebra. Despite a week at George Mason University's Math Boot Camp, the would-be computer science major failed the math placement test to qualify for calculus four times. He didn't know the basics. Across the country, more students are placing into pre-college math, reports AP's Collin Binkley. "At many universities, engineering and biology majors are struggling to grasp fractions and exponents." At George Mason in Northern Virginia, fewer would-be STEM majors are getting into calculus and more are failing, he writes. “We’re talking about college-level pre-calculus and calculus classes, and...