Students in Grades 9-12 can sign up now (until noon on April 17) to reserve a spot — first come, first served — for Harvard’s Splash! — a weekend of free, online classes taught by undergraduates. This year, Splash! will run virtually on April 23 (10AM-12:15PM) and April 24 (1PM-3:15PM). Registration will begin on April 18 for all those who have reserved a spot. If you have questions, email harvardhuse@gmail.com. The course catalog is not yet available, but sign up now anyway, in anticipation of some engaging classes.