Grammar isn't taught through explicit rules. Instead, it is "hidden" within the texts, allowing your brain to naturally recognize patterns and structures.
The phrase typically refers to the digital versions or textbooks of this series, which focus on learning through natural input rather than rote grammar rules. Core Principles of the Delft Method delftse methode pdf
Test your knowledge by filling in gaps in the text or performing dictation exercises to verify spelling and syntax. About the Delftse methode - TU Delft Grammar isn't taught through explicit rules
If you are using the Delftse Methode materials from NT2.nl or a PDF textbook, the study cycle generally follows these steps: it is "hidden" within the texts