The Hygiene Improvement Project (HIP) was a six-year USAID-funded program that worked at scale to improve and sustain hygiene practices. HIP aimed to reduce diarrheal disease prevalence in children under five through the promotion of key hygiene practices: hand washing, safe disposal of feces, and safe storage and treatment of drinking water. HIP also integrated hygiene improvement into other health platforms such as HIV-AIDS and other infectious diseases, as well as non-health platforms such as schools. Working at scale, HIP developed programs in Ethiopia, Madagascar, Uganda, and Nepal. The communication materials in this project include training material, participant guides, social marketing information, posters, cue cards, manuals, and how-to guides on making tippy taps and latrines. These references can be found in multiple languages relative to the host country.