Sometimes called The God view, because you, the writer, are letting the reader see and know everything as if they, like you, are looking down from above. Basically, you're writing in the third person, using he, she, it and they, and you're using exposition, moving from scene to scene, place to place, person to person.
Most MG of the 20th Century. Though they didn't call it Middle Grade then, just children's fiction plus suggested age group. The Secret Garden, The Midnight Folk, Carrie's War, A Little Princess.