SJND SUMMER DISCOVERY #3 Your choice of one-week Summer Discovery class or activity at SJND. For the summer of 2013, SJND's Summer Discovery has a new selection of academics, athletics and fun activities for students entering grades 3 through 9. Try photography, improv or Back-to School Boot Camp or volleyball, basketball or conditioning clinics. This offer does not apply to Shakespeare Players, Cooking with Mitch, Chess, Legos or Science Lab.