- May Haddad has developed dozens of resource materials and publications over her career related to health, education, and development. She authored books, designed visual materials, and involved others in the development and testing process.
- The materials have been published in Arabic by various organizations like UNICEF, Save the Children, NGOs, and others. Several publications involved print runs of tens of thousands of copies or were reprinted multiple times.
- The publications cover topics like maternal and child health, nutrition, immunization, reproductive health, and more. She adapted international books to the Arab context and authored several original resource books and materials.