This depends on the surveys you’re using with the system. Many of today’s available instruments are only validated to certain grade levels (usually down to 4th grade in most cases). We’ve tested our technology and interfaces with children as young as Kindergarten, and you’d be surprised at how much they’re able to accomplish. However, they often lack the literacy skills to reliably interpret questions and respond accordingly. We are working with some partners on tools to make it possible to collect this data from younger students, so stay tuned.