We understand different users have different needs. As we expand to add content for advancing levels, we must provide some organizing principle, and grade leveling is the most obvious. This has often been requested by teachers and parents. However, we are aware many students will seek or need activities that may be considered outside of their age or level. So we have organized the grouping to allow the student to quickly jump to any activity of interest. If you have questions or recommendations about this change, please contact us.