Chromebooks are a laptop computer running Chrome OS operating system. It is primarily designed to be run while connected to the internet and having the ability to access Google App for Education (GAFE). Chromebooks do have a limited ability to work offline but if you are working on a managed device (i.e. within an educational domain) this setting may be disabled.
Chromebook introduction/tutorial
Google Cast for Education (teacher side) and Google Cast (student side)
Wirelessly cast your screen or student screens to the entire class. (tutorial coming soon)