 Bletchley Park  The Bletchley Park Trust
Also known as Station X, Bletchley Park is the home of the United Kingdom's Government Code and Cipher School (GC&CS). Read about its history, including decrypting the German Enigma code, Alan Turing's contribution of the "Bombe," and the various huts
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 Blind Childrens Center
A nonprofit organization based in Los Angeles, CA (U.S.) available to blind and partially sighted children regardless of race, color, national or ethnic origin, sex, religion or ability to pay. Links to programs for infants and preschoolers; family
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 Block Schedules and Student Performance on AP Examinations  Robert Smith and Wayne J. Camara  collegeboard.com, Inc.
Download a PDF article that concludes that "[t]he instructional schedule does affect student grades on the four AP Examinations in this 1998 study after they have been adjusted for group differences in student ability. The results from this study generally
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 Block Scheduling Archive  Teacher Education Center, Academy One
A professional development discussion: several math teachers share their experiences with block scheduling.
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 Block Scheduling  Center for Applied Research and Educational Improvement (CAREI)
CAREI, part of the College of Education & Human Development of the Univ. of Minnesota, offers information for educators and administrators currently using the block system, as well as for schools considering switching from a schedule having 6, 7 or
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 Block Scheduling Effects on a State Mandated Test of Basic Skills  Veal, Schreiber; Education Policy Analysis Archives
A study that examined the effects of a trischedule on the academic achievement of students in a high school. The trischedule consisted of a traditional, 4x4 block, and hybrid schedules running at the same time in the same high school. The effectiveness
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 Block Scheduling Resources  Cleveland HeightsUniversity Heights School District
A collection of reports and discussions about block scheduling, and links to schools that use it.
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 Block Scheduling: Structuring Time To Achieve National Standards in Mathematics and Science  Bernard Durkin
The national standards for science and mathematics education call for sufficient instructional time for inquiryoriented activities, accompanying discussion, and explanations of concepts involved. Several of the standards will require increased time to
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 Blogic  J. David Velleman, Dept. of Philosophy, Univ. of Michigan
An interactive textbook in logic. Topics and interactive software include: Boolean searching; logic circuits; truthtables; Turing machines; foundations of probability; modal logic with possibleworlds diagrams; quantification. Includes interactive
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 Blog of a Math Teacher
A newly minted math teacher reflects on going back to school, the first day of practice teaching, state certification, job hunting, the interview, and more. With archives dating back to July, 2003.
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 Blog of Science  Pierre Far
A blog started in December, 2005, by a bacterial geneticist to "write about the latest scientific discoveries, explaining them in terms everyone can understand." Far favors topics that "affect people," so blogsci.com tends to feature health and medicine
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 Blog on math blogs  American Mathematical Society
A blog by "two mathematicians touring the mathematical blogosphere." Posts, which date back to April, 2013, have included "Binary Bonsai and Other Mathematical 'Plants,'" "Building the World Digital Mathematical Library," "On Pregnancy and Probability,"
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 BLOSSOMS  Massachusetts Institute of Technology Learning International Networks Consortium (MIT LINC)
Video modules that enliven existing curricula with clips and support materials for inclass teachers to intersperse in active, goaloriented exercises. Each module includes a teacher's guide, downloadable handouts, and a list of additional resources;
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 Blue Web'n Learning Sites Library
Learning Applications: a library of Internetbased instruction. Search for applications by grade level, application type, content area, Dewey number, and/or keyword. A Content Table shows the number of entries for each content area and application type
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 Bob's Pages  Bob Allanson
A collection of geometry applets. Generate and modify polyhedra, investigate the Mandelbrot and Julia sets, or experiment with Pappus's arbelos, the porisms of Poncelet and Steiner, and a logarithmic spiral.
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 Body Surface Area Calculator  Evelio PerezAlbuerne
Calculate the surface area of your body (in square meters) from height and mass.
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 Boil, Boil, Toil and Trouble: The International Boiling Point Project  Center for Improved Engineering and Science Education (CIESE)
People from all over the world boil water at different elevations and post data to discover which factor in the experiment (room temperature, elevation, volume of water, or heating device) has the greatest influence on boiling point. Anyone can boil water,
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 Bonsonhos HomePage  David Salvado
See and learn about trigonometry with the freeware program Círculo Trigonométrico 2.0. Also a way of calculating Pi. Veja e aprenda o que é a trigonometria com o programa freeware Círculo Trigonométrico 2.0. Aprenda
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 bontegames  Bart Bonte
Logic and physics Flash challenges from the independent game designer behind "factory balls" and "sugar, sugar": a blocky christmas, furiosity, 40xEscape, farafalla, 14 locks, and more.
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 Bookfill Publications  C. J. Davis
Algebra and geometry workbooks formatted to facilitate writing all answers directly onto the book. These books, for Year 10 and Year 11 students who require GCSE maths revision, cover general Foundation and Higher level topics.
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 Book of Odds  Book of Odds, Inc.
A dictionary "filled not with words, but with numbers – the odds of everyday life." The Book of Odds "contains hundreds of thousands of Odds Statements, from the odds of being the only one to survive a plane crash, to the odds of having a heart attack,
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 Books and other nonweb resources (History of Mathematics)  David Joyce; Dept. of Mathematics & Computer Science, Clark University
Organizations devoted to the history of Mathematics; a Bibliography of source books; Journals; Bibliographies and catalogues; and Texts on the history of mathematics.
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 Books by Lillian Lieber  Lillian Lieber, Hugh Gray Lieber, Paul Dry Books
Paul Dry Books has republished three of Lillian Lieber's books on mathematics: The Education of T.C. MITS: What Modern Mathematics Means to You, Infinity: Beyond the Beyond the Beyond, and Einstein's Theory of Relativity. Lillian Lieber was the head of
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 Books: Professional & Technical: Education  Amazon.com
Browse bestselling books about education from the Professional and Technical Bookstore at Amazon.com, in categories such as General; Biographies of Educators; Counseling; Education Theory; Lesson Planning; Preschool & Kindergarten; Reference; Special
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 Books: Professional & Technical: Professional Science: Mathematics  Amazon.com
Browse bestselling math books from the Professional and Technical Bookstore at Amazon.com, in such categories as Applied; Chaos & Systems; Geometry & Topology; Mathematical Analysis; Mathematical Physics; Number Systems; Pure Mathematics; Transformations;
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 Boolean Algebra (Encarta Encyclopedia 2008)  Microsoft Encarta Online
Boolean Algebra, branch of mathematics having laws and properties similar to, but different from, those of ordinary high school algebra. Formally a Boolean algebra is a mathematical system consisting of a set of elements, which may be called B, together
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 Boomerang (SMILE)  Wilhelm L. Lilly, Kenwood Academy High School
A lesson for grades 412 designed to teach students to estimate angles in degrees and distances in feet or meters; collect data and analyze a histogram; and (optionally) study gyroscopic precession and aerodynamics. From the Recreational and Creative
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 Border Pattern Gallery  John Wolfe; Geometric Structures Class, Oklahoma State University
A gallery developed as a class project: creating and classifying border patterns (also called frieze or band patterns) provides an engaging introduction to symmetry for students of all ages. Examples and explanations for seven different border types.
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 Bottles in a Wine Rack  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Arranging wine bottles in a rack leads, under certain circumstances, to a curious mathematical problem discussed in books by S. Wagon and R. Honsberger. The site arouse out of an attempt to illustrate their solution. The dynamic illustration quickly
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 Bowman in Arabia  Bowman Dickson
Blog by a teacher of calculus and AP Calculus at King's Academy (Jordan) who "believes in optimism and enthusiasm above all else." Posts, which date back to August, 2009, have included "Maybe I'm starting to become more Jordanian"; "But my son told me
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 Boxes and Bags  Aunt Annie's Crafts
Five projects that are fun to make and teach some basics of geometry: Snowflakes, Geometric Solids, and More Geometric Solids work well in gift wrapping; Flexagons and Tangrams make nice gifts. All of the projects can also be incorporated into lesson
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 Boxplots in Excel  Neville Hunt, Coventry University
A method for using Microsoft Excel to create boxplots, or box and whisker diagrams, which provide a simple graphical summary of a set of data. Boxplots show a measures of central location (the median), two measures of dispersion (the range and interquartile
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 Boy or Girl?  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
In a twochild family, one child is a boy. What is the probability that the other child is a girl? What if the older child is a boy?
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 The Brachistochrone  Paul Kunkel
An investigation of the problem: We are given two fixed points in a vertical plane. A particle starts from rest at one of the points and travels to the other under its own weight. Find the path that the particle must follow in order to reach its destination
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 The brachistochrone problem
 MacTutor Math History Archives
Linked essay on the brachistochrone problem, posed by Johann Bernoulli in Acta Eruditorum in June, 1696. With references and other related web sites.
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 BrainBashers  Kevin N. Stone
A collection of logic, language and math puzzles, in a choice of easy/medium/hard. Rate the puzzles; show their answers. Logic puzzles include Einstein's Puzzle. Play games of strategy, such as "Four in a Row" (also known as "Connect Four") or games based
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 BrainBashers  Kevin Stone
Five math or logic challenges on a page, each with clickable hints and solutions. For games, visit http://www.brainbashersgames.com/.
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 Brainers  PedagoNet
More than 60 word problems and puzzles designed to develop logic and problemsolving skills. Submit your answers and suggestions to become part of the Wall of Fame. Site is in English, French, and Spanish.
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 Brain Food  Puzzles For the Brain To Gnaw On  Samuel Stoddard
Hundreds of online (CGI) puzzles, including logic puzzles, word problems, number puzzles, lateral thinking puzzles, scrambled equations, cryptograms, loginumber puzzles, discrete reasoning puzzles, mathematical reasoning puzzles, knight's dilemma, magic
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 Brainfreeze Puzzles  Riley, Philip; and Taalman, Laura
Free example puzzles and solving tips for colorful, handdesigned Sudoku variation puzzles with additional rules that challenge you to rethink your old Sudoku strategies and devise new ones. From the authors of the book, Color Sudoku.
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 Brainly.com.br
"Estudamos em grupo." Faz perguntas; responde para ganhar rankings. Veja, em particular, o arquivo de dever e soluções na area de matemática.
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 Brain Science & ICT in Mathematics Education  Dave Moursund
An exploration of three major topics from a math education point of view: Brain Science Craft & Science of Teaching & Learning (C&S of T&L) Information & Communications Technology (ICT). Read the author's thoughts on constructivism,
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 Brainwave  Wognum Art
Ten visual puzzles, to test your visual and reasoning skills. Most have to do with symmetry recognition. There is a "top 5% brain" award to those who earn ten "smart bulbs."
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 Brainy Figuring  Ivars Peterson (MathTrek)
In the May 7 Science, Dehaene and collaborators at the Massachusetts Institute of Technology present the first hard evidence that two quite different modes of brain activity underlie our inborn capacity for mathematics. Their study indicates that learning
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 Bray Proves Penrose Conjecture in General Relativity (Math Chat)  Frank Morgan, MAA Online
In 1979 R. Schoen and S.T. Yau proved that the total mass of a universe must be positive. Last year [1998] G. Huisken and T. Ilmanen proved that the total mass is at least as large as the largest constituent mass: M >_ m1. Finally this year [1999] H.
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 Breaking Chocolate Bars  Cut the Knot!, Alexander Bogomolny
The chocolate bar puzzle has three parameters: two side lengths (m and n) and actual selection of lines along which to break the bar and its parts... An interactive column for MAA Online that uses a Java applet to simulate a puzzle or mathematical problem,
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 Breaking the Light Barrier  Michael H. Walker
Galleries of fractal images: Flarium 1, Inkblot 1, etc.
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 Brendan McKay
Software includes nauty, a program for computing automorphism groups of graphs and digraphs, which can also produce a canonical labelling; and plantri, a program for generating planar triangulations. Also, skeptical treatment of claims made of miraculous
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 Bret Victor
From the creator of Kill Math, Victor's "umbrella project for techniques that enable people to model and solve meaningful problems of quantity using concrete representations and intuitionguided exploration" in pursuit of a "widelyusable, insightgenerating
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 The Bridges of Königsberg  Isaac Reed
This problem inspired the great Swiss mathematician Leonard Euler to create graph theory, which led to the development of topology.
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