Introducing the concept on the first contribution
After the user makes the first edit of a significant size, we can introduce the Neutral Point of View concept (text based on the training library).
A variant based on evaluating examples
We can consider explaining the concepts more connected to specific examples. In the example below, an example edit is provided for the user to evaluate regarding the Neutral point of view. After the user makes a choice, the answer is provided with more detail on why the edit aligns with Neutral Point of View principle or not.
As part of a self-assessment for contribution quality
After the user makes one of their initial contributions, clicks on "publish" and no other specific lesson has been shown.
On problematic pages
When the user clicks on edit on an article that seems problematic because it is a high-traffic, featured or was marked by the community as such (using templates like Controversial topics, Pages under discretionary sanctions, Recent deaths, Semi-protected pages),
As a follow-up suggestion
When the user completes publishing an edit and gets redirected to the reading view, improving the article neutrality (among other activities) can be proposed as a next step for the editor. That can help to discover new ways to contribute and learn about their associated key concepts. Once the user selects an option, te'd go back to editing with specific guidance for the task.
Alternatively, the ways to follow-up can be collapsed if we want to provide them in a less prominent way (initially, or for the later edits):
As a multi-step animation
Showing an animated example to illustrate how an example edit can be problematic, and how to improve it to make it more neutral. The animation is shown next to key pieces of information to reinforce the learning.