VERBAL MATH LESSON I: Step-by-Step Math without Pencil or Paper: Level 1 (Verbal Math Lesson: Step-by-Step Math without Pencil or Paper)
by CHARAN LANGTON
ISBN 13: 9780913063095
Format: Paperback (166 pages) Publisher: MOUNTCASTLE CO Published: 01 Sep 2007
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The Reading Lesson: Teach Your Child to Read in 20 Easy Lessons (The Reading Lesson series)
by Michael Levin,Charan Langton
ISBN 13: 9780913063026
Format: Illustrated (448 pages) Publisher: Mountcastle Co Published: 01 Apr 2002
La Leccion de Mathematica Verbal 1: paso a paso sin lápiz y papel (Cálculo Mental)
by Michael Levin, Charan Langton
ISBN 13: 9780913063316
Format: Paperback (180 pages) Publisher: Mountcastle Company Published: 10 May 2020