1 | | Learning and teaching early math : The learning trajectories approach / Douglas H. Clements, Julie Sarama . - New York : Routledge, Taylor & Francis Group, 2014. - xiv, 380 pages : il. ; 26 cm. - ( Studies in mathematical thinking and learning series ) Mã xếp giá: 372.7 C626Đăng ký cá biệt: Lầu 2 KLF: 2000006844 |