Karwai Tang/WireImage Prince George, Princess Charlotte and Prince Louis are returning to the classroom to kick off a new school year Kate Middleton and Prince William's children are all enrolled at Lambrook School The royal siblings have all gone to the prep school since 2022 Prince George,Princess CharlotteandPrince Louisare embarking on a new school year that's especially momentous. The royal siblings returned to the classroom at the Lambrook School on Sept. 3, and the academic year ahead is the last thatPrince WilliamandKate Middleton's three children will all be enrolled there together. Prince George, 12, will age out of the coeducational prep school next summer when he turns 13, with Prince William's alma mater, Eton College,earmarked as the front-runnerfor where he might attend next. Prince George, Princess Charlotte, 10, and Prince Louis, 7, began at Lambrook when their family moved from London to Windsor in 2022, enrolling as day students at the private school in Berkshire. The trio'sfirst day at Lambrookcame with new photos of the siblings attending a preview day with their parents. The Prince and Princess of Wales/Instagram "That chimes with William wanting to do things in a more modern way, putting all three children in the same school," royal author Sally Bedell Smith tells PEOPLE in anexclusive cover story. "It's a new direction — groundbreaking for the royal family." According to the school's website, "The Lambrook experience combines first-class teaching and superb facilities with traditional values, set in the idyllic surroundings of 52 acres of beautiful Berkshire countryside." Theschool's facilitiesinclude a "25-meter swimming pool, Astroturf, Hard Courts, a Diamond Jubilee Performing Arts Studio, Dance Studio and Sports Hall," ideal offerings for the Prince and Princess of Wales'sporty children. As George, Charlotte and Louis set off on a new school year, there's another major change ahead for their family. PEOPLE confirmed in August thatthe Prince and Princess of Wales' family is movingfrom Adelaide Cottage to a new home called Forest Lodge before the end of the year. The move from the four-bedroom cottage to the eight-bedroom residence will be an upgrade, yet keep them within the same Windsor estate. Chris Jackson/Getty; English Heritage/Heritage Images/Getty Can't get enough of PEOPLE's Royals coverage?Sign up for our free Royals newsletterto get the latest updates on Kate Middleton, Meghan Markle and more! Forest Lodge is said to be the family's forever home, where theyplan to stay even after Prince William accedes to the throneone day. The Prince and Princess of Wales are funding renovations and the move themselves, making a change that will create a fresh startfollowing a difficult yearin which Princess Kate and King Charles were diagnosed with cancer. The Princess of Wales announced in January that she isin remission, while the King'streatment is ongoing. Read the original article onPeople