This special report, another installment in "Education Week's" series on virtual education, examines the growing e-learning opportunities for students with disabilities, English-language learners, gifted and talented students, and those at risk of failing in school. It shows the barriers that exist for greater participation among special populations, as well as the benefits and drawbacks of this approach. It also looks at the funding tactics schools are using to build virtual education programs for special populations and the evolving professional-development needs for these efforts.