KWL table. A KWL table, or KWL chart, is a graphical organizer designed to help in learning. The letters KWL are an acronym, for what students, in the course of a lesson, already know, want to know, and ultimately learn. It is a part of the constructivist teaching method where students move away from what are considered traditional methods of teaching and learning.
(rÄ­-dÅ­kâ²shÉn) n. 1. The act or process of reducing. 2. The result of reducing: a reduction in absenteeism. 3. The amount by which something is lessened or diminished: a reduction of 12 percent in violent crime. 4. A sauce that has been thickened or concentrated by boiling.
Reduction is the gain of one or more electrons by an atom. When the oxidation number of an element decreases, that means there is a gain of electrons and that element is being reduced.