This DIY workbook by Justin Sacks outlines a tool developed by the New Economics Foundation to measure how effectively different parts of a local economy are working. This tool (LM3) has been tried and tested across the UK, from agriculture to social enterprise to local government procurement, to determine how money coming into a community is then spent and re-spent. This guide shows you how to use LM3 to find out what’s really happening in a local economy, and how this economy can improve.