The Routledge Encyclopedia of Language Teaching and Learning is an authoritative handbook dealing with all aspects of this increasingly important field of study. It has been produced specifically for language teaching professionals, but can also be used as a reference work for academic studies at postgraduate level.

Comprising 440 essays arranged alphabetically, mostly on individual objects, artifacts, techniques, and products, this is an up-to-date work of reference for all those involved in teaching or researching the history of 20th-century technology, as well as the serious general reader. The core of each of the main entries is a technical description, within a historical narrative, of about 1000 words plus illustrations and further reading. There are also about 30 longer survey entries that address broad questions of technological systems, such as the context in which the various technologies were developed, discussions of any controversies and schools of thought, comparisons between different political and economics systems, and the various ways in which different nations have attempted to make and apply science and technology policies. A W.A. Addis, Buro Happold, Middlesex, United Kingdom. Aaron Alcorn, Cleveland Heights, Ohio, USA. K. W. Allen, Joining Technology Research Center, Oxford Brookes University, United Kingdom.

Includes over 4,000 entries covering the subject from absolute zero to the zeeman effect. As well as highlighted entries on key topies, this dictionary will feature: / an extensive range of physics data tables -- electrical conductivity, refractive index, standard physics formulae, and much more, so as to make the book both dictionary and data book. / references to a wide selection of useful physics websites -- for example webelment.com for the latest updates on whether ununoctium really is element 118 or not ! There are over 60,000 A-level students and 5,000 degree students (plus many more in subjects such as electronics or where standard physics knowledge is required).

In the United States, social class ranks with gender, race, and ethnicity in determining the values, activities, political behavior, and life chances of individuals. Most scholars agree on the importance of class, although they often disagree on what it is and how it impacts Americans. This A-Z encyclopedia, the first to focus on class in the United States, surveys the breadth of class strata throughout our history, for high school students to the general public.