Richard Kuipers The trusty old tale of a city slicker teacher being posted to a school in the sticks is given a fresh coat of paint in the delightful Bhutanese comic drama “Lunana: A Yak in the Classroom.” Gloriously filmed on staggeringly beautiful locations around the most remote school on Earth and wonderfully performed by a cast comprised almost exclusively of first-time actors, this big-hearted crowd-pleaser marks a bright debut for writer-director Pawo Choyning Dorji.