The use of the word point here can be understood in two different ways, which basically end up meaning the same thing in the context of a textbook:
- A particular place in a route (where one can stop, for example).
- In photography point is the focal point where the picture is the neatest.
Language textbooks often have particular pages at regular intervals in their units that focus on a particular topic in some areas, often grammar and culture.
For example the FLE1 textbook Alter ego has a point culture that “give information with a sociocultural content through the use of texts and activities.”
The equivalent in EFL2 textbooks is often called “Focus on …” which retains the aspect of the focal point but does not reflect the idea of the place where you make a stop on the way.
1. FLE: Français langue étrangère
2. EFL: English as a Foreign Language.