From the University of Texas, Grimm Grammar uses classic Grimm Fairy Tales updated for the 21st century. From the about page of the site:
The primary audience for Grimm Grammar is the beginning language learner. Each part of speech – e.g., adjective, adverb, noun, verb – is introduced by a sectional overview, and then further explained in relevant, thoroughly cross-referenced sub-topics: e.g., articles, the past tense of regular verbs, etc.
Grammar descriptions in English/German and self-correcting exercises promote the understanding of grammar concepts through plausible communicative contexts – what someone might actually say in real life – using predominantly discourse-length language samples.
A website called UniLang offers free language resources for a large number of languages. You can also view resources by the type (video, flashcards, audio, courses, games, etc.). Some of the videos are hosted on public places like YouTube, but what’s great about UniLang is that you don’t have to search through a ton of videos on YouTube for a certain educational language video. To view the resources, click on the link below: