This collection contains the resources for both trainers and participants for the Biosand Filter for Technicians workshop. This three-five day workshop is designed for biosand filter technicians. This workshop includes instruction and hands-on experience in construction of the biosand filter – including the concrete container, filtration sand and gravel, diffuser, and lid. The participant will gain a clear understanding of how to construct a filter, how to install the filter, and how to instruct end users on its correct use and maintenance.