Redox shorthand for oxidation-reduction reactions describe all chemical reactions in which atoms have their oxidation number oxidation state changed. This can be either a simple redox process, such as the oxidation of carbon to yield carbon dioxide CO2 or the reduction of carbon by hydrogen to yield methane CH4 , or a complex process such as the oxidation of sugar C6H12O6 in the human body through a series of complex electron transfer processes. Two chemical reactions always occurring at the same time are known as oxidation-reduction reactions or redox reactions. Chemical reactions involving the change in the oxidation number of the atoms that are involved in the reaction are called redox reactions. The valency of the atom carrying the sign that represents the nature of the charge denotes the oxidation number.
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Too Much Homework Can Lower Test Scores, Researchers Say | HuffPost
Schools are getting rid of homework from Essex, Mass. In fact, while eliminating homework may come as a surprise to many of us, the debate is not new. Parents and educators have been talking about this subject for the last century, swinging the educational pendulum back and forth between the need for homework and the need to eliminate homework. One of the great, yet often forgotten problems with homework is how it disproportionately affects students from less affluent families. Kids from disadvantaged homes are more likely to work at afterschool jobs, or to be home without supervision in the evenings while their parents work multiple jobs.
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What are the pros and cons of homework? Is it beneficial? From dioramas to book reports, and algebraic word problems to research projects, the type and amount of homework given to students has been debated for over a century. Opponents of homework say that too much may be harmful for students as it can increase stress, reduce leisure and sleep time, and lead to cheating. They also say that it widens social inequality and is not proven to be beneficial for younger children.
The topic, no, just the word itself, sparks controversy. It has for a long time. Drawing on the theories of his fellow educational progressive, psychologist G. The Journal was an influential magazine, especially with parents. An anti-homework campaign burst forth that grew into a national crusade.