Lenchner, George
Overview
Works:  18 works in 46 publications in 1 language and 520 library holdings 

Genres:  Textbooks 
Roles:  Author 
Classifications:  QA43, 510.7 
Publication Timeline
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Most widely held works by
George Lenchner
Math Olympiad contest problems for elementary and middle schools by
George Lenchner(
Book
)
5 editions published between 1997 and 1999 in English and held by 150 WorldCat member libraries worldwide
5 editions published between 1997 and 1999 in English and held by 150 WorldCat member libraries worldwide
Creative problem solving in school mathematics by
George Lenchner(
Book
)
12 editions published between 1983 and 2008 in English and held by 148 WorldCat member libraries worldwide
12 editions published between 1983 and 2008 in English and held by 148 WorldCat member libraries worldwide
The overhead projector in the mathematics classroom by
George Lenchner(
Book
)
5 editions published between 1966 and 1974 in English and held by 111 WorldCat member libraries worldwide
The first section of this pamphlet illustrates and describes the overhead projector, and discusses several of its advantages over other projection devises, including its simplicity of operation, conservation of class time, dynamic effects, image size, etc. The second section describes in some detail materials and methods used to make visuals, then discusses ways to employ visuals more effectively, with suggestions on the use of color, printing and lettering, and overlays. Loose, hinged, rotating, sliding, and masked overlays are described, and an example is shown of how to use a series of overlays to illustrate a mathematical identity. Finally, there is a summary of indirect processes for making overlays from textbooks, magazines, and other printed material, when heat, diazo, photocopy, electrostatic, or lift processes may be used. Section 3 discusses how to design an effective visual once the purpose is determined, then describes and illustrates the development of six different sample visuals. Section 4 suggests additional uses for overlaysexplaining mathematical tables, discussing homework problems, writing test questions, illustrating locus problems, showing transparent models, silhouettes, moving elements, ripple tanks, etc. Section 5 lists references, research publications, and sources of equipment and materials. (Cr)
5 editions published between 1966 and 1974 in English and held by 111 WorldCat member libraries worldwide
The first section of this pamphlet illustrates and describes the overhead projector, and discusses several of its advantages over other projection devises, including its simplicity of operation, conservation of class time, dynamic effects, image size, etc. The second section describes in some detail materials and methods used to make visuals, then discusses ways to employ visuals more effectively, with suggestions on the use of color, printing and lettering, and overlays. Loose, hinged, rotating, sliding, and masked overlays are described, and an example is shown of how to use a series of overlays to illustrate a mathematical identity. Finally, there is a summary of indirect processes for making overlays from textbooks, magazines, and other printed material, when heat, diazo, photocopy, electrostatic, or lift processes may be used. Section 3 discusses how to design an effective visual once the purpose is determined, then describes and illustrates the development of six different sample visuals. Section 4 suggests additional uses for overlaysexplaining mathematical tables, discussing homework problems, writing test questions, illustrating locus problems, showing transparent models, silhouettes, moving elements, ripple tanks, etc. Section 5 lists references, research publications, and sources of equipment and materials. (Cr)
Mathematical Olympiad contest problems for children : (also for teachers, parents, and other adults) by
George Lenchner(
Book
)
2 editions published in 1990 in English and held by 43 WorldCat member libraries worldwide
2 editions published in 1990 in English and held by 43 WorldCat member libraries worldwide
Modern mathematics, geometry by
Myron Frederick Rosskopf(
Book
)
4 editions published in 1966 in English and held by 19 WorldCat member libraries worldwide
4 editions published in 1966 in English and held by 19 WorldCat member libraries worldwide
Geometry by
Myron Frederick Rosskopf(
Book
)
2 editions published in 1971 in English and held by 14 WorldCat member libraries worldwide
2 editions published in 1971 in English and held by 14 WorldCat member libraries worldwide
Maths olympiad contest problems for primary and middle schools by
George Lenchner(
Book
)
1 edition published in 2005 in English and held by 13 WorldCat member libraries worldwide
1 edition published in 2005 in English and held by 13 WorldCat member libraries worldwide
Basic facts of elementary algebra by
George Lenchner(
Book
)
3 editions published in 1963 in English and held by 5 WorldCat member libraries worldwide
3 editions published in 1963 in English and held by 5 WorldCat member libraries worldwide
Solutions AP calculus problems part II AB and BC, 1987  2001 by Judith Broadwin(
Book
)
2 editions published in 2001 in English and held by 4 WorldCat member libraries worldwide
2 editions published in 2001 in English and held by 4 WorldCat member libraries worldwide
Solutions A.P. calculus problems part II AB and BC, 19761990 by Judith Broadwin(
Book
)
1 edition published in 1990 in English and held by 4 WorldCat member libraries worldwide
1 edition published in 1990 in English and held by 4 WorldCat member libraries worldwide
Math Olympiad contest problems for elementary and middle schools by
George Lenchner(
Book
)
2 editions published between 1997 and 2008 in English and held by 3 WorldCat member libraries worldwide
2 editions published between 1997 and 2008 in English and held by 3 WorldCat member libraries worldwide
Solutions A.P. calculus problems part II AB and BC, 19841998 by Judith Broadwin(
Book
)
1 edition published in 1998 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 1998 in English and held by 2 WorldCat member libraries worldwide
A study of the effect of the use of overhead projection on achievement in presenting selected topics of circular functions by
George Lenchner(
)
1 edition published in 1972 in English and held by 1 WorldCat member library worldwide
1 edition published in 1972 in English and held by 1 WorldCat member library worldwide
Contest problems for children by
George Lenchner(
Book
)
1 edition published in 1990 in English and held by 1 WorldCat member library worldwide
1 edition published in 1990 in English and held by 1 WorldCat member library worldwide
A visual approach to modern algebra I, Book 18 (Transparencies) by
George Lenchner(
Book
)
1 edition published in 1968 in English and held by 1 WorldCat member library worldwide
1 edition published in 1968 in English and held by 1 WorldCat member library worldwide
Solutions A.P. calculus problems part II AB and BC, 1999 by Judith Broadwin(
Book
)
1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide
1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide
A visual approach to modern algebra II & trigonometry, Book 18 (Transparencies) by
George Lenchner(
Book
)
1 edition published in 1968 in English and held by 0 WorldCat member libraries worldwide
1 edition published in 1968 in English and held by 0 WorldCat member libraries worldwide
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Associated Subjects
Academic achievement Algebra Calculus Geometry GeometryStudy and teaching GeometryStudy and teaching (Secondary) Mathematics MathematicsStudy and teaching MathematicsStudy and teaching (Elementary) MathematicsStudy and teaching (Primary) MathematicsStudy and teaching (Secondary) MathematicsStudy and teachingAudiovisual aids Overhead projection Problem solving Problem solvingStudy and teaching Problem solvingStudy and teaching (Elementary) Problem solvingStudy and teaching (Secondary) Trigonometry U.S.A. Mathematical Olympiad Visual aids