海量图书期刊资源,随时随地畅享阅读乐趣
Miscellaneous Studies in EducationReview by: Harl R. Douglass · The School Review · 1925
The Modern High-School CurriculumHarl R. Douglass · The School Review · 1955
Current Criticism of Teacher EducationDouglass, Harl R. · The Educational Forum · 1955
Scientific Investigation of Instructional ProblemsDouglass, Harl R. · The Journal of Educational Research · 1935
MEASURING ACHIEVEMENT IN FIRST YEAR ALGEBRAHARL R. DOUGLASS · The Mathematics Teacher · 1923
The Basic Responsibility of Public EducationHarl R. Douglass · The Phi Delta Kappan · 1942
What Is Good Teaching?Harl R. Douglass · The High School Journal · 1939
Ponderings on Pocket-sized PolyhedraS. Louise Gould · The Mathematics Teacher · 2012
What Are These Things Called Variables?SIGRID WAGNER · The Mathematics Teacher · 1983
The Many Uses of Algebraic VariablesRandolph A. Philipp · The Mathematics Teacher · 1992
Finding Skewed Lattice RectanglesDick J. Smith and Eric F. Errthum · The Mathematics Teacher · 2012
Babylonian QuadraticsROBERT D. McMILLAN · The Mathematics Teacher · 1984
Understanding Connections between Equations and GraphsEric J. Knuth · The Mathematics Teacher · 2000
The Purple Milk ProblemKasi C. Allen · The Mathematics Teacher · 2012
The Birthday Problem, EmpiricallyDustin L. Jones · The Mathematics Teacher · 2012