I'd think about who uses pencils. If you start with age brackets, then schools is a good one, but think who else. Architects and engineers maybe? As well, use of pencils is generational - most people on here are young and write entirely with computers. My guess would be that older people are more analogue, and so use pencils more. What about people that haven't access to computers as well?
The danger with starting with age brackets is that everyone starts with age brackets, so what you need to do is show that you're thinking beyond the framework to be memorable.
I'd think about who uses pencils. If you start with age brackets, then schools is a good one, but think who else. Architects and engineers maybe? As well, use of pencils is generational - most people on here are young and write entirely with computers. My guess would be that older people are more analogue, and so use pencils more. What about people that haven't access to computers as well?
The danger with starting with age brackets is that everyone starts with age brackets, so what you need to do is show that you're thinking beyond the framework to be memorable.