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Peer reviewedKii, Toshi – Gerontologist, 1982
Discusses conventional indices for measuring the aging of populations. Proposes a new index for measuring the aging of populations using the proportions of all available age categories. Focuses on changes in the structure of a population. (RC)
Descriptors: Aging (Individuals), Demography, Population Distribution, Population Trends
Download full textMartin, Michael O.; Mullis, Ina V. S.; Foy, Pierre; Stanco, Gabrielle M. – International Association for the Evaluation of Educational Achievement, 2012
For more than 50 years, the International Association for the Evaluation of Educational Achievement (IEA) has been conducting comparative studies of educational achievement in a number of curriculum areas, including mathematics and science. TIMSS 2011 represents the fifth cycle of the Trends in International Mathematics and Science Study (TIMSS),…
Descriptors: Science Achievement, Comparative Education, Educational Trends, Trend Analysis
