Hall Davidson began teaching in 1971. He taught middle and high school English, mathematics, Spanish, and bilingual mathematics, as well as college courses on technology for teacher credential candidates. He left the classroom to teach math on television, winning an Emmy award and spending 20 years at Los Angeles area PBS stations teaching, leading staff development, and championing content creation by students and teachers. He is a frequent contributor to national education publications, co-authored TechWorks, an internationally distributed classroom technology kit, and co-founded Kitzu.org, a resource of free online kits to encourage project-based learning with media. He was elected to the board of Computer-Using Educators where he served for six years.

He joined Discovery Education in 2005 where he blogs, creates webinars, and works in educational partnerships and Global Learning Initiatives as a director of the Discovery Educator Network. He has spoken about technology and education to audiences around the world.