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2. Crossword - Wikipedia

   en.wikipedia.org/wiki/Crossword

   An American-style crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter ...

3. Missing square puzzle - Wikipedia

   en.wikipedia.org/wiki/Missing_square_puzzle

   The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

4. Jigsaw (teaching technique) - Wikipedia

   en.wikipedia.org/wiki/Jigsaw_(teaching_technique)

   The jigsaw technique is a cooperative learning method that brings about both individual accountability and achievement of the team goals. [5] The process derives its name from the jigsaw puzzle because it involves putting the parts of the assignment together to form a whole picture. [6] The assignment is divided into parts and the class is also ...

5. Graph coloring - Wikipedia

   en.wikipedia.org/wiki/Graph_coloring

   A proper vertex coloring of the Petersen graph with 3 colors, the minimum number possible. In graph theory, graph coloring is a special case of graph labeling; it is an assignment of labels traditionally called "colors" to elements of a graph subject to certain constraints. In its simplest form, it is a way of coloring the vertices of a graph ...

6. Word ladder - Wikipedia

   en.wikipedia.org/wiki/Word_ladder

   Word ladder. Lewis Carroll's doublet in Vanity Fair, March 1897 changing the word "head" to "tail" in five steps, one letter at a time. Word ladder (also known as Doublets, [1] word-links, change-the-word puzzles, paragrams, laddergrams, [2] or word golf) is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and ...

7. The ClueFinders - Wikipedia

   en.wikipedia.org/wiki/The_ClueFinders

   The first ClueFinders title, The ClueFinders 3rd Grade Adventures: The Mystery of Mathra, was released in January 1998, and The ClueFinders 4th Grade Adventures was released in July. The Learning Company used their new game as the prototype for Internet Applet technology, which allowed users to download supplementary activities from the ...