Gilbert a valverde (27 résultats)

Many Visions, Many Aims Vol. 2 : A Cross-National Investigation of Curricular Intentions in School Mathematics
William H. Schmidt; Curtis C. McKnight; Gilbert A. Valverde; Richard T. Houang; David E. Wiley
- Couverture souple
Vendeur : Better World Books, Mishawaka, IN, Etats-UnisBetter World Books
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Satisfaisant
EUR 8,11
Frais de port gratuitsExpédition nationale : Etats-UnisQuantité disponible : 1 disponible
Etat : Good. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Softcover reprint of the original 1st ed. 1997.

Many Visions, Many Aims Vol. 2 : A Cross-National Investigation of Curricular Intentions in School Mathematics
William H. Schmidt; Curtis C. McKnight; Gilbert A. Valverde; Richard T. Houang; David E. Wiley
- Couverture souple
Vendeur : Better World Books, Mishawaka, IN, Etats-UnisBetter World Books
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Satisfaisant
EUR 8,11
Frais de port gratuitsExpédition nationale : Etats-UnisQuantité disponible : 2 disponibles
Etat : Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Softcover reprint of the original 1st ed. 1997.…

- Couverture souple
Vendeur : Better World Books, Mishawaka, IN, Etats-UnisBetter World Books
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Satisfaisant
EUR 33,33
Frais de port gratuitsExpédition nationale : Etats-UnisQuantité disponible : 1 disponible
Etat : Good. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

According to the Book: Using TIMSS to investigate the translation of policy into practice through the world of textbooks
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W.H.; Houang, Richard T.
- Couverture rigide
Vendeur : -OnTimeBooks-, Phoenix, AZ, Etats-Unis-OnTimeBooks-
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Satisfaisant
EUR 43,47
Frais de port gratuitsExpédition nationale : Etats-UnisQuantité disponible : 1 disponible
Etat : good. A copy that has been read, remains in good condition. All pages are intact, and the cover is intact. The spine and cover show signs of wear. Pages can include notes and highlighting and show signs of wear, and the copy can include "From the library of" labels or previous owner inscriptions. 100% GUARANTEE! Shipped with delivery confirmation, if you're not satisfied with purchase please return item! Ships via media mail.…

According To The Book : Using Timss To Investigate The Translation Of Policy Into Practice Through The World Of Textbooks
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W.H.; Houang, Richard T.
- Couverture rigide
Vendeur : Romtrade Corp., STERLING HEIGHTS, MI, Etats-UnisRomtrade Corp.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 84,55
Frais de port gratuitsExpédition nationale : Etats-UnisQuantité disponible : 1 disponible
Etat : New. This is a Brand-new US Edition. This Item may be shipped from US or any other country as we have multiple locations worldwide.

According to the Book : Using Timss to Investigate the Translation of Policy into Practice Through the World of Textbooks
Valverde, Gilbert A. (EDT); Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W. H.; Houang, Richard T.
- Couverture rigide
Vendeur : GreatBookPrices, Columbia, MD, Etats-UnisGreatBookPrices
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Comme neuf
EUR 128,47
EUR 2,33 expéditionExpédition nationale : Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : As New. Unread book in perfect condition.

Many Visions, Many Aims: A Cross-National Investigation of Curricular Intentions in School Mathematics
William H. Schmidt; Curtis C. McKnight; Gilbert A. Valverde; Richard T. Houang; David E. Wiley
- Couverture souple
Vendeur : Ria Christie Collections, Uxbridge, Royaume-UniRia Christie Collections
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 128,71
EUR 13,22 expéditionExpédition depuis Royaume-Uni vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : New. In English.

According to the Book: Using TIMSS to investigate the translation of policy into practice through the world of textbooks
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W.H.; Houang, Richard T.
- Couverture rigide
Vendeur : Ria Christie Collections, Uxbridge, Royaume-UniRia Christie Collections
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 128,71
EUR 13,22 expéditionExpédition depuis Royaume-Uni vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : New. In English.

Many Visions, Many Aims
Schmidt, W. H.|McKnight, Curtis C.|Valverde, Gilbert A.|Houang, Richard T.|Wiley, David E.
- Couverture souple
Vendeur : moluna, Greven, Allemagnemoluna
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 92,27
EUR 48,99 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Kartoniert / Broschiert. Etat : New.

Many Visions, Many Aims
Schmidt, W. H.|McKnight, Curtis C.|Valverde, Gilbert A.|Houang, Richard T.|Wiley, David E.
- Couverture rigide
Vendeur : moluna, Greven, Allemagnemoluna
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 92,27
EUR 48,99 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Gebunden. Etat : New.

According to the Book : Using Timss to Investigate the Translation of Policy into Practice Through the World of Textbooks
Valverde, Gilbert A. (EDT); Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W. H.; Houang, Richard T.
- Couverture rigide
Vendeur : GreatBookPricesUK, Woodford Green, Royaume-UniGreatBookPricesUK
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 128,70
EUR 17,57 expéditionExpédition depuis Royaume-Uni vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : New.

According to the Book : Using Timss to Investigate the Translation of Policy into Practice Through the World of Textbooks
Valverde, Gilbert A. (EDT); Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W. H.; Houang, Richard T.
- Couverture rigide
Vendeur : GreatBookPrices, Columbia, MD, Etats-UnisGreatBookPrices
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 145,83
EUR 2,33 expéditionExpédition nationale : Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : New.

According to the Book : Using Timss to Investigate the Translation of Policy into Practice Through the World of Textbooks
Valverde, Gilbert A. (EDT); Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W. H.; Houang, Richard T.
- Couverture rigide
Vendeur : GreatBookPricesUK, Woodford Green, Royaume-UniGreatBookPricesUK
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Comme neuf
EUR 130,85
EUR 17,57 expéditionExpédition depuis Royaume-Uni vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Etat : As New. Unread book in perfect condition.

Many Visions, Many Aims
. Ed(s): Schmidt, William H.; McKnight, Curtis C.; Valverde, Gilbert A.; Houang, Richard T. (Michigan State University, East Lansing, USA); Wiley, Da
- Couverture souple
Vendeur : Kennys Bookshop and Art Galleries Ltd., Galway, GY, IrlandeKennys Bookshop and Art Galleries Ltd.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 137,18
EUR 9,50 expéditionExpédition depuis Irlande vers Etats-UnisQuantité disponible : 15 disponibles
Etat : New. Examines features of curriculum policy across the TIMSS countries, especially the role of textbooks and curriculum guides. This book portrays similarities and differences in mathematics curricula in the succession of objectives across grades. Editor(s): Schmidt, William H.; McKnight, Curtis C.; Valverde, Gilbert A.; Houang, Richard T. (Michigan State University, East Lansing, USA); Wiley, David E. (Northwestern University, USA). Num Pages: 276 pages, 22 black & white illustrations, biography. BIC Classification: JN; PB. Category: (P) Professional & Vocational. Dimension: 260 x 193 x 17. Weight in Grams: 725. . 1997. Hardback. . . . . …

According to the Book: Using TIMSS to investigate the translation of policy into practice through the world of textbooks
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, W.H.; Houang, Richard T.
- Couverture rigide
Vendeur : BennettBooksLtd, Los Angeles, CA, Etats-UnisBennettBooksLtd
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 149,12
EUR 6,14 expéditionExpédition nationale : Etats-UnisQuantité disponible : 1 disponible
hardcover. Etat : New. In shrink wrap. Looks like an interesting title.

According to the Book
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, William H.; Houang, Richard T. (Michigan State University, East Lansing, USA)
- Couverture souple
Vendeur : Kennys Bookshop and Art Galleries Ltd., Galway, GY, IrlandeKennys Bookshop and Art Galleries Ltd.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 141,01
EUR 9,50 expéditionExpédition depuis Irlande vers Etats-UnisQuantité disponible : 15 disponibles
Etat : New. How are curriculum policies translated into opportunities to learn in the classroom? This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries. It examines policy implications from the understandings. Num Pages: 199 pages, biography. BIC Classification: JN; PD. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 240 x 160 x 11. Weight in Grams: 670. . 2002. Paperback. . . . .…

According to the Book
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, William H.; Houang, Richard T. (Michigan State University, East Lansing, USA)
- Couverture rigide
Vendeur : Kennys Bookshop and Art Galleries Ltd., Galway, GY, IrlandeKennys Bookshop and Art Galleries Ltd.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 143,26
EUR 9,50 expéditionExpédition depuis Irlande vers Etats-UnisQuantité disponible : 15 disponibles
Etat : New. Presents findings from a cross-national study of textbooks - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included an inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries. Num Pages: 199 pages, biography. BIC Classification: JN; PD. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 244 x 170 x 12. Weight in Grams: 1050. . 2002. Hardback. . . . .…

Many Visions, Many Aims
. Ed(s): Schmidt, William H.; McKnight, Curtis C.; Valverde, Gilbert A.; Houang, Richard T. (Michigan State University, East Lansing, USA); Wiley, Da
- Couverture rigide
Vendeur : Kennys Bookstore, Olney, MD, Etats-UnisKennys Bookstore
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 175,15
EUR 9,27 expéditionExpédition nationale : Etats-UnisQuantité disponible : 15 disponibles
Etat : New. Examines features of curriculum policy across the TIMSS countries, especially the role of textbooks and curriculum guides. This book portrays similarities and differences in mathematics curricula in the succession of objectives across grades. Editor(s): Schmidt, William H.; McKnight, Curtis C.; Valverde, Gilbert A.; Houang, Richard T. (Michigan State University, East Lansing, USA); Wiley, David E. (Northwestern University, USA). Num Pages: 276 pages, 22 black & white illustrations, biography. BIC Classification: JN; PB. Category: (P) Professional & Vocational. Dimension: 260 x 193 x 17. Weight in Grams: 725. . 1997. Hardback. . . . . Books ship from the US and Ireland. …

According to the Book
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, William H.; Houang, Richard T. (Michigan State University, East Lansing, USA)
- Couverture souple
Vendeur : Kennys Bookstore, Olney, MD, Etats-UnisKennys Bookstore
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 180,07
EUR 9,27 expéditionExpédition nationale : Etats-UnisQuantité disponible : 15 disponibles
Etat : New. How are curriculum policies translated into opportunities to learn in the classroom? This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries. It examines policy implications from the understandings. Num Pages: 199 pages, biography. BIC Classification: JN; PD. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 240 x 160 x 11. Weight in Grams: 670. . 2002. Paperback. . . . . Books ship from the US and Ireland.…

According to the Book
Valverde, Gilbert A.; Bianchi, Leonard J.; Wolfe, Richard G.; Schmidt, William H.; Houang, Richard T. (Michigan State University, East Lansing, USA)
- Couverture rigide
Vendeur : Kennys Bookstore, Olney, MD, Etats-UnisKennys Bookstore
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 182,75
EUR 9,27 expéditionExpédition nationale : Etats-UnisQuantité disponible : 15 disponibles
Etat : New. Presents findings from a cross-national study of textbooks - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included an inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries. Num Pages: 199 pages, biography. BIC Classification: JN; PD. Category: (P) Professional & Vocational; (UP) Postgraduate, Research & Scholarly; (UU) Undergraduate. Dimension: 244 x 170 x 12. Weight in Grams: 1050. . 2002. Hardback. . . . . Books ship from the US and Ireland.…

Many Visions, Many Aims: A Cross-National Investigation of Curricular Intentions in School Science/ School Mathematics (2 vols./ 2 Bände)
Schmidt, William H., Curtis C. McKnight Gilbert A. Valverde a. o.:
Langue : anglais
Edité par Kluwer Academic publ., 1997
Vendeur : books4less (Versandantiquariat Petra Gros GmbH & Co. KG), Welling, Allemagnebooks4less (Versandantiquariat Petra Gros GmbH & Co. KG)
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Occasion - Assez bon
EUR 103,00
EUR 34,95 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 1 disponible
Ajouter au panierGebundene Ausgabe. Etat : Gut. 276/ 296 Seiten; Die hier angebotenen Bände stammen aus einer teilaufgelösten wissenschaftlichen Bibliothek und trägt die entsprechenden Kennzeichnungen (Rückenschild, Instituts-Stempel.). Schnitt und Einband sind etwas staubschmutzig; der Buchzustand ist ansonsten ordentlich und dem Alter entsprechend gut; KOMPLETTPREIS für 2 Bände; bei Versand ins Ausland erfragen Sie bitte zuerst die Versandkosten; ENGLISCH! Sprache: Englisch Gewicht in Gramm: 1700.…

Langue : anglais
Edité par Springer Netherlands, Springer Netherlands Nov 2002, 2002
- Couverture souple
- impression à la demande
Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, AllemagneBuchWeltWeit Ludwig Meier e.K.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 117,69
EUR 23,00 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 2 disponibles
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -How are curriculum policies translated into opportunities to learn in the classroom According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries.Drawing on these data, the authors investigate the rhetorical and pedagogical features of textbooks to understand how they promote and constrain educational opportunities. They investigate how textbooks are constructed and how they structure diverse elements into prescriptions for teaching practice.The authors break new ground in understanding textbooks in terms of different educational opportunities that they make possible. The book examines policy implications from these new understandings. In particular, conclusions are offered regarding the role of textbooks in curriculum-driven educational reform, in light of their role as promoters of qualitatively distinct educational opportunities. 212 pp. Englisch.…

According to the Book
Gilbert A. Valverde|Leonard J. Bianchi|Richard G. Wolfe|W.H. Schmidt|Richard T. Houang
- Couverture souple
- impression à la demande
Vendeur : moluna, Greven, Allemagnemoluna
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 101,04
EUR 48,99 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Kartoniert / Broschiert. Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. How are curriculum policies translated into opportunities to learn in the classroom?According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 19.…

According to the Book
Gilbert A. Valverde|Leonard J. Bianchi|Richard G. Wolfe|W.H. Schmidt|Richard T. Houang
- Couverture rigide
- impression à la demande
Vendeur : moluna, Greven, Allemagnemoluna
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 101,04
EUR 48,99 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : Plus de 20 disponibles
Gebunden. Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. How are curriculum policies translated into opportunities to learn in the classroom?According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 19.…

- Couverture rigide
- impression à la demande
Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, AllemagneBuchWeltWeit Ludwig Meier e.K.
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 139,09
EUR 23,00 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 2 disponibles
Buch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -How are curriculum policies translated into opportunities to learn in the classroom According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries.Drawing on these data, the authors investigate the rhetorical and pedagogical features of textbooks to understand how they promote and constrain educational opportunities. They investigate how textbooks are constructed and how they structure diverse elements into prescriptions for teaching practice.The authors break new ground in understanding textbooks in terms of different educational opportunities that they make possible. The book examines policy implications from these new understandings. In particular, conclusions are offered regarding the role of textbooks in curriculum-driven educational reform, in light of their role as promoters of qualitatively distinct educational opportunities. 212 pp. Englisch.…

Langue : anglais
Edité par Springer Netherlands, Springer Netherlands Nov 2002, 2002
- Couverture rigide
- impression à la demande
Vendeur : buchversandmimpf2000, Emtmannsberg, BAYE, Allemagnebuchversandmimpf2000
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 117,69
EUR 60,00 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 1 disponible
Buch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -How are curriculum policies translated into opportunities to learn in the classroom According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries.Drawing on these data, the authors investigate the rhetorical and pedagogical features of textbooks to understand how they promote and constrain educational opportunities. They investigate how textbooks are constructed and how they structure diverse elements into prescriptions for teaching practice.The authors break new ground in understanding textbooks in terms of different educational opportunities that they make possible. The book examines policy implications from these new understandings. In particular, conclusions are offered regarding the role of textbooks in curriculum-driven educational reform, in light of their role as promoters of qualitatively distinct educational opportunities.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 212 pp. Englisch.…

Langue : anglais
Edité par Springer Netherlands, Springer Netherlands Nov 2002, 2002
- Couverture souple
- impression à la demande
Vendeur : buchversandmimpf2000, Emtmannsberg, BAYE, Allemagnebuchversandmimpf2000
Contacter le vendeurVendeur avec une évaluation de 5 étoilesEtat: Neuf
EUR 117,69
EUR 60,00 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 1 disponible
Taschenbuch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -How are curriculum policies translated into opportunities to learn in the classroom According to the Book presents findings from the largest cross-national study of textbooks carried out to date - the curriculum analysis of the 1995 Third International Mathematics and Science Study (TIMSS). This study included a detailed, page-by-page, inventory of the mathematics and science content, pedagogy, and other characteristics collected from hundreds of textbooks in over forty countries.Drawing on these data, the authors investigate the rhetorical and pedagogical features of textbooks to understand how they promote and constrain educational opportunities. They investigate how textbooks are constructed and how they structure diverse elements into prescriptions for teaching practice.The authors break new ground in understanding textbooks in terms of different educational opportunities that they make possible. The book examines policy implications from these new understandings. In particular, conclusions are offered regarding the role of textbooks in curriculum-driven educational reform, in light of their role as promoters of qualitatively distinct educational opportunities.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 212 pp. Englisch.…