Digital Inking - Improves Teaching & Learning
I have visited a number of schools and demonstrated many of the natural hand gestures for editing and Ink Replay available in Office365 and the response is always very positive.
I have recently found the above infographic showing independent research from Sharon Oviatt, an expert in human centered interfaces,multi-modal interfaces and use of pen inputs on computers. I find that the numbers above resonate with teachers that I've been working with who are using Digital Inking to prepare student work, provide feedback and mark assessment.
There are many and varied compelling reasons to try Digital Inking and with a wider range of devices now supporting this, from entry level OEM offerings through to the newly announced Surface Laptop, there is bound to be a device that meets your budget and requirements.