Remedial classes await. Thousands of Colorado high schoolers are graduating this month with plans to go to college in the fall. Hundreds of them will be academically unprepared when they get there. Those students will take — and pay for — remedial classes that don’t count toward a degree. Educators say the need for remedial work is fueled largely by a lack of communication between high schools and colleges about what’s important to know. They also say high school students need to pay closer attention to class selection and grades, especially in the senior year when many coast toward graduation...