Sixth-grade book / Grace Burton... [et al.]. - Reston: National Council of Teachers of Mathematics, 1993. - 32 p. : ill. ; 28 cm. - Curriculum and evaluation standards for school mathematics addenda seriesGrades K-6 . ISBN: 087353316X Subjects--Topical Terms: Mathematics--Study and teaching (Elementary) Dewey Class. No.: 372.7