The official Walnut app for the smart parents of Walnut School. One place to get all school related notifications. The Wal-Sh app has been released by Arpita Karkarey's Walnut School for its parents. Features: 1. Messages: We know that keeping tab of so many facets of your child's life is difficult. Worksheets, circulars, dates, homework and all that. The messages feature keeps everything in one place and handy to look up whenever and wherever. Here are some types of messages