My daughter (a Spanish student) and I collaborated on this video to explain the nature of language in very straight forward terms. We specifically chose to avoid jargon like "comprehensible input" The purpose to reassure students who are new to proficiency and language acquisition that they way they are learning is appropriate. They can sometimes be worried about the lack of explicit learning.
Williams, J. (University of C. (2011). Unconscious language learning | University of Cambridge. Retrieved September 22, 2017, from http://www.cam.ac.uk/research/news/unconscious-language-learning
Sklar, A. Y., Levy, N., Goldstein, A., Mandel, R., Maril, A., & Hassin, R. R. (2012). Reading and doing arithmetic nonconsciously. Proceedings of the National Academy of Sciences of the United States of America, 109(48), 19614–9. https://doi.org/10.1073/pnas.1211645109
Krashen, S. (2013). Evidence that implicit learning (subconscious language acquisition) results in L1-like brain processing: A comment on Morgan-Short, Steinhauer, Sanz & Ullman (2012). Retrieved April 25, 2017, from http://skrashen.blogspot.com/2013/11/evidence-that-implicit-learning.html
Lee, J., & VanPatten, B. (2003). Making Communicative Language Teaching Happen. (W. R. Glass, Ed.) (2nd Ed.). New York, NY: McGraw Hill.
VanPatten, B. (2016). Language. (Taylor & Francis, Ed.) (1st ed.). New York, NY: Routledge. Retrieved from http://routledgetextbooks.com/textbooks/9781315679594/
VanPatten, B. (2003). From Input to Output: A Teacher’s Guide to Second Language Acquisition. (B. VanPatten & J. F. Lee, Eds.) (2nd ed.). Mc Graw Hill.
VanPatten, B. (ACTFL. org. (2017). While We’re on the Topic | American Council on the Teaching of Foreign Languages (1st ed.). Alexandria, VA: ACTFL.org. Retrieved from https://www.actfl.org/publications/books-and-brochures/while-were-the-topic (CLT Principle 3)