The course must provide a written transcript for every single piece of audio or video content. If you watch a lecture or a dialogue, you must be able to read exactly what was said. This allows you to "spot the gap"—discovering that what you thought you heard is different from what was actually said.

Your plateau is not permanent. It is simply a sign that you are working with one hand tied behind your back. Untie the knot. Use your eyes and ears together. Your fluent future starts with the next word you read and hear.