The World Wide Web has become an important resource for public awareness and for educating the worldʼs population, including its political leaders, students, researchers, teachers, and ordinary citizens seeking information. Relevant information on photosynthesis-related web sites is grouped into several categories: (1) group sites, (2) sites by subject, (3) individual researcherʼs sites, (4) sites for educators and students, and (5) other useful sites.