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Showing 12 of 2,425 publications

National Council of Teachers of Mathematics

Organized groups of teachers of mathematics or of individuals preparing to become teachers of mathematics may petition the NCTM Board of Directors to become affiliated with the ...

1979 Mathematics Teacher Learning and Teac... 8527 citations

Focus Groups as Qualitative Research

Introduction Focus Groups as Qualitative Method The Uses of Focus Groups Planning and Research Design for Focus Groups Conducting and Analyzing Focus Groups Additional Possibili...

1997 8458 citations

Isotopic Variations in Meteoric Waters

The relationship between deuterium and oxygen-18 concentrations in natural meteoric waters from many parts of the world has been determined with a mass spectrometer. The isotopi...

1961 Science 8452 citations