| Research and practice in K-12 online learning: A review of open access literature CS Cavanaugh, MK Barbour, T Clark The International Review of Research in Open and Distributed Learning 10 (1), 2009 | 624 | 2009 |
| Attitudes of higher education faculty toward distance education: A national survey T Clark American Journal of Distance Education 7 (2), 19-33, 1993 | 381 | 1993 |
| A synthesis of new research on K-12 online learning R Smith, T Clark, RL Blomeyer Learning point associates, 2005 | 332 | 2005 |
| Virtual Schools: Trends and Issues. A Study of Virtual Schools in the United States. T Clark For full text: http://www. dlrn. org/virtualstudy. pdf., 2001 | 299 | 2001 |
| Virtual schools: Planning for success ZL Berge Teachers College Press, Columbia Univ., 2005 | 248 | 2005 |
| Virtual schools: Trends and issues T Clark A study of virtual schools in the United States, 2001 | 200 | 2001 |
| Virtual and distance education in American schools T Clark Handbook of distance education, 673-699, 2003 | 121 | 2003 |
| Virtual and distance education in American schools T Clark Handbook of distance education, 673-699, 2003 | 121 | 2003 |
| Virtual high schools, state of the states: A study of virtual high school planning and operation in the United States TA Clark, M Dickson Center for the Application of Information Technologies, 2000 | 70 | 2000 |
| The landscape of K-12 online learning C Cavanaugh, T Clark What works in K-12 online learning. Eugene, OR: International Society for …, 2007 | 52 | 2007 |
| Online learning: Pure potential T Clark Educational Leadership 65 (8), 11-15, 2008 | 48 | 2008 |
| Online, blended, and distance education in schools: Building successful programs T Clark, M Barbour Taylor & Francis, 2023 | 46 | 2023 |
| Th e Evolution of K–12 Distance Education and Virtual Schools TOM CLARK Handbook of distance education, 573-591, 2013 | 39 | 2013 |
| Illinois virtual high school evaluation, 2001–2002 T Clark, E Lewis, E Oyer, J Schreiber Carbondale, IL: TA Consulting and Southern Illinois University. Retrieved …, 2002 | 34 | 2002 |
| Virtual schools and eLearning: Planning for success T Clark, Z Berge 19th Annual Conference on Distance Teaching and Learning, 1-5, 2005 | 25 | 2005 |
| Evaluation and approval constructs for online and blended courses and providers MK Barbour, T Clark, K DeBruler, J Bruno | 18 | 2014 |
| Virtual schools Z Berge, T Clark Distance Learning 6 (2), 1-9, 2009 | 18 | 2009 |
| Virtual schools: Status and trends T Clark Phoenix, AZ: WestEd/Distance Learning Resource Network. Retrieved January 19 …, 2001 | 17 | 2001 |
| Virtual Schools: Trends and issues. Report commissioned by the Distance Learning Resource Network, a WestEd Project; co-sponsored by the Centre for the Application of … T Clark | 11 | 2001 |
| Virtual schools and elearning: Planning for success Z Berge, T Clark Proceedings from the 19th Annual Conference on Distance Teaching and …, 2005 | 9 | 2005 |
