Step 1: Understanding written extension methods.
Written extension methods are teaching aids that rely on written words and printed materials.
They include items like bulletins, leaflets, circular letters, newsletters, and newspapers.
Step 2: Checking options.
- Bulletins: A type of written material → Written method.
- Leaflets: Short written informational papers → Written method.
- News article: Published written form → Written method.
- Chart: Mainly a visual tool, often uses diagrams, figures, and images → Not purely written.
Step 3: Conclusion.
Therefore, a chart is not considered part of the written extension teaching method.