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› Robert J. Marzano (11)
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› Robert J. Marzano (11)
› Spencer Kagan (8)
› John Hattie (6)
» Toon alle opties (16)
› Shirley Clarke (5)
› Debra J. Pickering (4)
› Tammy Heflebower (4)
› Ban Har Yeap (3)
› Carola Riemens (2)
› Dook Kopmels (2)
› Elselien van Tol (2)
› Eric Jensen (2)
› James Nottingham (2)
› Jana S. Marzano (2)
› Julia Cook (2)
› Klaus Zierer (2)
› Miguel Kagan (2)
› Phil Warrick (2)
› Todd Whitaker (2)
› William Mulcahy (2)
› Debra J. Pickering (4)
› Tammy Heflebower (4)
› Ban Har Yeap (3)
› Carola Riemens (2)
› Dook Kopmels (2)
› Elselien van Tol (2)
› Eric Jensen (2)
› James Nottingham (2)
› Jana S. Marzano (2)
› Julia Cook (2)
› Klaus Zierer (2)
› Miguel Kagan (2)
› Phil Warrick (2)
› Todd Whitaker (2)
› William Mulcahy (2)