A series of books, written articles, handouts and worksheets in the field of math and philosphy; Educational publications, namely, educational learning cards, flash cards, activity cards, workbooks, textbooks, activity books, story books, puzzle books, printed puzzles, teacher guides, manuals, posters and educational booklets in the field of math and philosophy

'activ':25,29 'articl':6 'book':4,30,32,34 'booklet':43 'card':22,24,26 'educ':17,20,42 'field':12,46 'flash':23 'guid':38 'handout':7 'learn':21 'manual':39 'math':14,48 'name':19 'philosophi':50 'philosphi':16 'poster':40 'print':35 'public':18 'puzzl':33,36 'seri':2 'stori':31 'teacher':37 'textbook':28 'workbook':27 'worksheet':9 'written':5

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