Harvard University has announced it will implement online learning for all courses during the coming academic year, while tuition for the Ivy League school will remain about $50,000. Up to 40 percent of undergraduate students will be cleared to live on campus this fall, including all incoming freshmen, according to a statement posted Monday on Harvard’s website. All Harvard seniors will be allowed to return to campus in the spring semester, with freshmen returning home. However, even those students who choose to live on campus will be required to take part in online instruction.