One of my pupils (Y8) showed me a link to a quiz today. It was from another pupil’s blog (Y9). His post is here: http://thereleaseoflight.weebly.com/hemispherical-brain-dominance-theory.html.
Once the quiz is complete it gives you the embed code for your results. It seems I’m a marginal lefty. Takes two minutes if you’re curious about your own hemispherical balance.