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  2. Michael Sokolski - Wikipedia

    en.wikipedia.org/wiki/Michael_Sokolski

    He was the engineer who developed Scantron's multiple choice answer sheets, which use a number 2 pencil to read and grade a student's test results. [3] He held several of the company's optical mark recognition (OMR) patents in the United States. [3] The introduction of the Scantron test revolutionized tests given in all forms of formal education.

  3. Optical mark recognition - Wikipedia

    en.wikipedia.org/wiki/Optical_mark_recognition

    An optical answer sheet or bubble sheet is a special type of form used in multiple choice question examinations. OMR is used to detect answers. OMR is used to detect answers. The Scantron Corporation creates many optical answer sheets, although certain uses require their own customized system.

  4. Scantron Corporation - Wikipedia

    en.wikipedia.org/wiki/Scantron_Corporation

    Scantron provides assessment solutions and technology services for business, education, certification, and government clients. Scantron Assessment Solutions deals with scanner manufacturing, forms printing, computer-based testing, and the creation of test questions by psychometricians. It operates in 98% of the US school districts, 56 countries ...

  5. Nelson–Denny Reading Test - Wikipedia

    en.wikipedia.org/wiki/Nelson–Denny_Reading_Test

    The Nelson–Denny Reading Test was created in 1930 by Martin J. Nelson and Emerson Charles Denny, both of whom were on the faculty of Iowa State Teacher's College.The purpose of the test is to measure reading ability among high school and college students.

  6. Invisible ink - Wikipedia

    en.wikipedia.org/wiki/Invisible_ink

    Invisible ink can be applied to a writing surface with a specialty purpose stylus, stamp, fountain pen, toothpick, calligraphy pen, Cotton swab, or even a finger dipped in the liquid.

  7. April 1965 - Wikipedia

    en.wikipedia.org/wiki/April_1965

    The 100th anniversary of the end of the American Civil War was observed in ceremonies near Appomattox, Virginia. Virginia Governor Albertis S. Harrison, Jr. , known for resisting school integration while serving as the state attorney general, told thousands of listeners that "the belief and the principles for which the Confederate forces fought ...

  8. Tuskegee Syphilis Study - Wikipedia

    en.wikipedia.org/wiki/Tuskegee_Syphilis_Study

    The Tuskegee Study of Untreated Syphilis in the Negro Male [1] (informally referred to as the Tuskegee Experiment or Tuskegee Syphilis Study) was a study conducted between 1932 and 1972 by the United States Public Health Service (PHS) and the Centers for Disease Control and Prevention (CDC) on a group of nearly 400 African American men with syphilis.

  9. Pencil - Wikipedia

    en.wikipedia.org/wiki/Pencil

    A pencil (/ ˈ p ɛ n s ə l / ⓘ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage and keeps it from marking the user's hand.