THE INFLUENCE OF INSTRUCTION ON PROPORTIONAL REASONING IN SEVENTH GRADERS.Published in:Journal of Research in Science Teaching, 1978, v. 15, n. 3, p. 227, doi. 10.1002/tea.3660150306By:Wollman, Warren T.;Lawson, Anton E.Publication type:Article
Program Evaluation for Policy-Setting.Published in:Educational Evaluation & Policy Analysis, 1979, v. 1, n. 5, p. 66, doi. 10.2307/1164078By:Wehmeyer, Lillian B.Publication type:Article
Combining Variables, Controlling Variables, and Proportions: Is There a Psychological Link?Published in:Science Education, 1979, v. 63, n. 1, p. 67, doi. 10.1002/sce.3730630111By:Lawson, Anton E.Publication type:Article