Gathering and reading RSS feeds is still a very valuable way to capture news and information. There are a number of RSS feed readers available for ChromeOS. Some are web-based and some have subscription costs attached. But, Feedbro is a ChromeOS/Chrome extension that offers full-function features to pull in content to read offline if you want.
Feedbro offers a lot of customization, allowing you to not only import and export your own feeds, but change how you read them, how often they are updated, and how they are organized.
The reading panel itself works like most any well-organized application, providing the ability to organize similar content into folders and then manipulate the reading panels to your preference.
Because Feedbro is a Chrome browser plugin, it will work for Mac, Windows, and Linux, too.
You can get it in the Chrome Web Store as an extension: Feedbro