The Deft response block allows a Manager or Editing teacher to create multiple tasks consisting of short texts, discussions or polls, and control remotely which ones are displayed and how students may interact with them.
There is a external service that is available to push notifications to clients to update content. This can be usually be configured easily from the plugin and is free for limited usage. Larger sites may need a service agreement in the future.
There is a example block in block area on the right of this page. You can create a free account here to use it if you like. (You will have to click enrol me in the course to at the top of the page to participate). Try opening this page in two browser windows and see how changes in one affect the other.