M. A. (“Ken”) Clements is Professor in the Department of Mathematics at Illinois State University. After teaching in schools for 10 years, he taught in three Australian universities (Monash, Deakin, and Newcastle), and at Universiti Brunei Darussalam (1997–2004). He has served as a consultant in India, Malaysia, PNG, South Africa, Thailand and Vietnam, and has been an editor for the three international handbooks on mathematics education (1996, 2003, 2012). He has written or edited 25 books and has authored many peer-reviewed articles. In 1996 he co-authored, with Nerida Ellerton, a UNESCO book on mathematics education research. He is honorary life member of both the Mathematics Education Research Group of Australasia (MERGA) and the Mathematical Association of Victoria (MAV).

• ​Early Moves Toward Metrication in Europe.- Measurement Chaos in North America, 1780–1980.- Opportunity Lost: Big Money Successfully Thwarts Thomas Jefferson’s Push for Metrication 1776–1793.- Muddling Along: Opposition to Moves for Metrication, 1793–1920.- David Eugene Smith’s Involvement in the Metrication Issue, 1920–1935.- The Decision for Metrication, 1970.- Reaganomics, Big Money, and the Crushing of the Metric Dream, 1970-1980.- Why has the United States Never Achieved Metrication?.

M. A. (“Ken”) Clements is Professor in the Department of Mathematics at Illinois State University. After teaching in schools for 10 years, he taught in three Australian universities (Monash, Deakin, and Newcastle), and at Universiti Brunei Darussalam (1997–2004). He has served as a consultant in India, Malaysia, PNG, South Africa, Thailand and Vietnam, and has been an editor for the three international handbooks on mathematics education (1996, 2003, 2012). He has written or edited 25 books and has authored many peer-reviewed articles. In 1996 he co-authored, with Nerida Ellerton, a UNESCO book on mathematics education research. He is honorary life member of both the Mathematics Education Research Group of Australasia (MERGA) and the Mathematical Association of Victoria (MAV).

• ​Early Moves Toward Metrication in Europe.- Measurement Chaos in North America, 1780–1980.- Opportunity Lost: Big Money Successfully Thwarts Thomas Jefferson’s Push for Metrication 1776–1793.- Muddling Along: Opposition to Moves for Metrication, 1793–1920.- David Eugene Smith’s Involvement in the Metrication Issue, 1920–1935.- The Decision for Metrication, 1970.- Reaganomics, Big Money, and the Crushing of the Metric Dream, 1970-1980.- Why has the United States Never Achieved Metrication?.

M. A. (“Ken”) Clements is Professor in the Department of Mathematics at Illinois State University. After teaching in schools for 10 years, he taught in three Australian universities (Monash, Deakin, and Newcastle), and at Universiti Brunei Darussalam (1997–2004). He has served as a consultant in India, Malaysia, PNG, South Africa, Thailand and Vietnam, and has been an editor for the three international handbooks on mathematics education (1996, 2003, 2012). He has written or edited 25 books and has authored many peer-reviewed articles. In 1996 he co-authored, with Nerida Ellerton, a UNESCO book on mathematics education research. He is honorary life member of both the Mathematics Education Research Group of Australasia (MERGA) and the Mathematical Association of Victoria (MAV).

• ​Early Moves Toward Metrication in Europe.- Measurement Chaos in North America, 1780–1980.- Opportunity Lost: Big Money Successfully Thwarts Thomas Jefferson’s Push for Metrication 1776–1793.- Muddling Along: Opposition to Moves for Metrication, 1793–1920.- David Eugene Smith’s Involvement in the Metrication Issue, 1920–1935.- The Decision for Metrication, 1970.- Reaganomics, Big Money, and the Crushing of the Metric Dream, 1970-1980.- Why has the United States Never Achieved Metrication?.