TEACHING IN THE FIELD OF MATHEMATICS; EDUCATIONAL SERVICES, NAMELY, TRAINING IN THE FIELD OF MATHEMATICS EDUCATION PROVIDED TO STUDENTS AND TEACHERS THROUGH SEMINARS, CONFERENCES, WORKSHOPS, AND WRITTEN MATERIALS

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INSTRUCTIONAL GUIDES, STUDENT WORKBOOKS, AND TEACHER'S MANUALS IN THE FIELD OF MATHEMATICS; PENS, PENCILS, PENCIL CASES AND DRAWING RULERS

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