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2. Two-cube calendar - Wikipedia

   en.wikipedia.org/wiki/Two-cube_calendar

   The problem is to determine the digits hidden on the seven invisible faces. [1] Gardner wrote he saw a two-cube desk calendar in a store window in New York. [1] According to a letter received by Gardner from John S. Singleton (England), Singleton patented the calendar in 1957, [3] but the patent lapsed in 1965. [4] [5]

3. Everyday Mathematics - Wikipedia

   en.wikipedia.org/wiki/Everyday_Mathematics

   Math Messages—These are problems, displayed in a manner chosen by the teacher, that students complete before the lesson and then discuss as an opener to the main lesson. Mental Math and Reflexes —These are brief (no longer than 5 min) sessions “…designed to strengthen children's number sense and to review and advance essential basic ...

4. Calendrical calculation - Wikipedia

   en.wikipedia.org/wiki/Calendrical_calculation

   A calendrical calculation is a calculation concerning calendar dates. Calendrical calculations can be considered an area of applied mathematics. Some examples of calendrical calculations: Converting a Julian or Gregorian calendar date to its Julian day number and vice versa (see § Julian day number calculation within that article for details).

5. History of mathematics - Wikipedia

   en.wikipedia.org/wiki/History_of_mathematics

   The history of mathematics deals with the origin of discoveries in mathematics and the mathematical methods and notation of the past.Before the modern age and the worldwide spread of knowledge, written examples of new mathematical developments have come to light only in a few locales.

6. AOL Calendar - AOL Help

   help.aol.com/products/aol-calendar

   AOL Calendar helps you stay connected and organized with the rest of the world.

7. Singapore math - Wikipedia

   en.wikipedia.org/wiki/Singapore_math

   A bar model used to solve an addition problem. This pictorial approach is typically used as a problem-solving tool in Singapore math. Singapore math teaches students mathematical concepts in a three-step learning process: concrete, pictorial, and abstract. [3] This learning process was based on the work of an American psychologist, Jerome Bruner.