I want to have an RSS feed for Moodle to know posts from teacher.
Is it possible / How can I do this?
According to Moodle docs
Activities that produce RSS feeds
Blog Database Forum Glossary
Subscribing to RSS feeds
To subscribe to an RSS feed from Moodle, go to the activity, click on the orange 'RSS' button and copy the address from your browser bar to your RSS reader software.
Note: Moodle 2.2 had a bug resulting in the RSS button not being displayed. This bug is resolved and fixed, see MDL-30202 for details.