Purchasing a Moki band for every child would provide the most accurate data for your school but is by no means essential. Given the pressure on budgets we designed Moki to be effective and flexible at lower volumes. Moki Bands can be shared and moved around your school so it’s not essential to purchase one for every student. However we recommend purchasing a minimum of one full class of bands and a single reader. That way you can rotate Moki periodically and build up a complete picture of your school’s physical activity levels.