The field testing of a one-year course of study using programed science materials at the fourth grade level
By: by W.D. Hedges ... [et al.].
Series: Educational research bulletin (University of Virginia) -- no.1
Publisher: Division of Educational Research, University of Virginia
Published: 1964
Place of publication: Charlottesville
Language: eng
Number of pages: 54
Subjects: Programmed instruction -- Research.; Science -- Programmed instruction