These Y series are great: their high-end specs, design, quality are unmatched compare to the price (so cheap!). If ones looking for All-in-One portable PC that able to do everything with lowest price, this are the best for sure.

But for your case (assume that your task are mostly for teachings and meetings), I really recommend Ultrabook, because of great battery life and easy to move around (thanks for their weight and slimness). Lot's of my clients (most from higher-ups, government Putrajaya area) are using Ultrabook because of these reasons. But be alert: you cannot do other great things like gaming because of lack of powerful graphics inside most Ultrabook. Also, the price is a bit expensive compare to other type of laptops.

Unless you're also love gaming or other heavy task (video editing, software development etc) and not afford enough to buy multiple PC's / laptop for that, or didn't care of weight / battery, I recommend ultrabook for you.