Not just for aficionados, the following tips may even make switching to Chrome OS a little easier for newcomers.
Use The Chrome App Launcher as a Calculator
In Chrome you can subtract the hassle of opening an app, launching a website or reaching for your phone or getting out pencil and paper by using the Chrome App Launcher to perform simple sums instead. Not surprisingly, like Google's search pages, basic things can be calculated quickly, and it supports semi-advanced features like brackets, tan, cos and sine.
Use Chrome App Launcher as a Unit Convertor
You can perform on-the-fly conversions in the launcher too. Just express your query as“{num} {original unit} in {needed unit}” and the result will appear. Supported/example conversations include grams to kilograms, millilitres to tablespoon, miles to km, meters, cm, mm, inches… and so on.
Use Chrome App Launcher to Open Apps By Voice

Perhaps not the best for the classroom, Google’s Launcher also has built-in voice search capabilities. Aside from barking random search terms at your device, you can also launch apps installed on your Chromebook by saying their name:
So, for example, saying “Ok, Google – Wunderlist” will launch Wunderlist (assuming it is installed).