3rd, 4th and 5th Grade Number Talks. The following resources have been created by Mollie Hall using Number Talks: Helping Children Building Mental Math and Computation Strategies (Parrish, 2010). It is recommended that you begin by reading through the book and also the following article: Number Talk Overview.
anomalies. 1  1 : something different, abnormal, peculiar, or not easily classified : something anomalous They regarded the test results as an anomaly. 2  2 : deviation from the common rule : irregularity. 3  3 : the angular distance of a planet from its perihelion as seen from the sun.
artifact arÂ·tiÂ·fact or arÂ·teÂ·fact (Ã¤r'tÉ-fÄkt') n. A structure or substance not normally present but produced by an external agent or action, such as a structure seen in a microscopic specimen after fixation that is not present in the living tissue. A skin lesion produced or perpetuated by self-inflicted action.