Well, I try to reread Erich Kästner's middle grade Christmas story Das fliegende Klassenzimmer (which is called The Flying Classroom in English translation) every year during the holiday, during the Christmas season. And every year, Das fliegende Klassenzimmer is a totally and utterly delightful Yuletide reading experience for me and one that I do very highly recommend either in the German original or in one of the English translations (and there are at least two of these).
But yes, with novels that have been perennial favourites since childhood, I often do find it both nigh impossible to in any way post a review that is for one adequately laudatory of either the author or his/her story (at least according to my own rather stringent criteria) and for two is in any manner remotely critical (even with regard to those textual parts that might in fact actually warrant this). And with this in mind, I have had my probably very favourite German language Christmas-themed children's classic, Erich Kästner's Das Fliegende Klassenzimmer (The Flying Classroom) languishing as rated with five stars and on my favourites shelf but unreviewed for many many years (even though I did tell myself every December that it was indeed high time to attempt a written many review, to tell my Goodreads friends just how much I love this novel and how much Das fliegende Klassenzimmer has in fact meant to me over the years). And now, I have decided to take the proverbial bull by its horns so to speak and to finally pen a review of Das fliegende Klassenzimmer, of probably my favourite novel by Erich Kästner, period, and to not care or rather to attempt to not care whether my review is expansive and congratulatory enough and to also not be all that academically, intellectually bothered with regard to probably still being rather blind with regard to many of the potential issues with regard to datedness, gender stratification and the like (because well, for a novel that was originally penned in the 1930s, Das Fliegende Klassenzimmer actually remains surprisingly fresh, new and with attitudes and philosophies that are still both important and essential for not only children but also for adults).
And wiithin the framework of a boarding school (an all boy's boarding school, of course, but really, the scenarios and issues shown within the pages of Das fliegende Klassenzimmer are in my opinion part and parcel to many school-themed stories, both uni-gender and co-educational, and really childhood in general), Erich Kästner portrays the importance of friendship, loyalty, overcoming personal fears and phobias and that remembering and yes also embracing one's childhood and one's past are essential for becoming a responsible and yes a likeable and respect-worthy adult (not to mention that while one is supposed to fight to master childhood trauma and problems, one also needs to remember it, to accept it and that it will always be a part of one's psyche and life, and that therefore, Johnny Trotz being abandoned by his father as a toddler will never leave him as a memory, and since he is a writer, will probably also make its way into his texts, his printed words, that Martin Thaler will always due to his family's issues with unjust unemployment and resultant poverty have a permanent sense of social justice and attempt to fight against what he perceives as injustice, just as universally loved teacher Dr. Bökh aka Justus has remembered how he suffered as a student at boarding school because his teachers were not particularly pleasant and approachable and has as a teacher striven to make himself someone whom his students can trust and turn to with their problems, with their both small and not so small issues and sadnesses). And really, Erich Kästner's glowingly positive depiction of Dr. Bökh has (I strongly believe) also been one of my main and lifelong career influences, for as an instructor of German at the college and university level, I have always and gladly first and foremost had my students and their intellectual welfare in mind, that they need to learn the material necessary as painlessly and in in as easy to understand a fashion as possible, and that instructing with a fair and easily comprehensible approach is much more important and necessary than class averages and somehow keeping these in the so-called but to and for me rather artificial and silly Bell-Curve.
Absolutely and most highly recommended is Erich Kästner's Das fliegende Klassenzimmer, and if you have not yet encountered Das fliegende Klassenzimmer either in its original German or in some of the (and yes, pretty well more than decent) English language translations (and I know there are also versions in French, Spanish etc.), do go and read the novel ASAP. And yes, the only minor caveats I do have to give with regard to Das fliegende Klassenzimmer is that there are indeed a few scenes of schoolyard fist and snowball fighting textually shown by Erich Kästner when the "Gymnasium" and the "Realschule" students duke it out, some minor cases of hazing and that cigarette smoking is unfortunately both featured and not really condemned all that much in Das fliegende Klassenzimmer (but that in particular the smoking scenes are in fact and in my opinion simply a sign of the times, as in the 1930s, when Das fliegende Klassenzimmer was published, cigarette smoking was generally still pretty much considered as not all that problematic and even often seen as a right of passage from childhood to being a bit more mature and adult-like, not to mention that many photographs I have seen of Erich Kästner show him smoking).