Reconstructing the unit on the number line: Tasks to extend fourth graders' fraction understandings.Published in:Investigations in Mathematics Learning, 2019, v. 11, n. 3, p. 180, doi. 10.1080/19477503.2018.1434594By:Cramer, Kathleen;Monson, Debra;Ahrendt, Susan;Wyberg, Terry;Pettis, Christy;Fagerlund, ChelseyPublication type:Article