TY - BOOK AU - BOOTH, Lesley.R TI - Algebra: : children's strategies and errors: a report of the strategies and errors in secondary mathematics project SN - 0700506365 PY - 1984/// CY - Berkshire PB - NFER-NELSON Publishing Company Ltd KW - Algebra KW - Problems, exercises etc N1 - Includes bibliographical references and index ER -