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  2. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    Usually, 1 is given when there is no work submitted at all (called kuolas in the academic jargon, meaning 'stake'); otherwise, most teachers keep 2 as the lowest grade and rarely mark work as 1. The lowest grade for passing a subject in the secondary education institutions is 4, while in the higher education institutions 5 is the lowest passing ...

  3. Dyscalculia - Wikipedia

    en.wikipedia.org/wiki/Dyscalculia

    Most adults with dyscalculia have a hard time processing math at a 4th-grade level. For 1st–4th grade level, many adults will know what to do for the math problem, but they will often get them wrong because of "careless errors", although they are not careless when it comes to the problem.

  4. Positive train control - Wikipedia

    en.wikipedia.org/wiki/Positive_train_control

    Positive train control (PTC) is a family of automatic train protection systems deployed in the United States. [1] Most of the United States' national rail network mileage has a form of PTC. These systems are generally designed to check that trains are moving safely and to stop them when they are not. [2]

  5. Mathematical anxiety - Wikipedia

    en.wikipedia.org/wiki/Mathematical_anxiety

    Mark H. Ashcraft defines math anxiety as "a feeling of tension, apprehension, or fear that interferes with math performance" (2002, p. 1). [2] It is a phenomenon that is often considered when examining students' problems in mathematics. According to the American Psychological Association, mathematical anxiety is often linked to testing anxiety.

  6. John von Neumann - Wikipedia

    en.wikipedia.org/wiki/John_von_Neumann

    In one of von Neumann's last articles, he lamented that pure mathematicians could no longer attain deep knowledge of even a fraction of the field. [371] In the early 1940s, Ulam had concocted for him a doctoral-style examination to find weaknesses in his knowledge; von Neumann was unable to answer satisfactorily a question each in differential ...

  7. Phil of the Future - Wikipedia

    en.wikipedia.org/wiki/Phil_of_the_Future

    Ms. Guinevere Winston (Suzanne Krull) is a second-grade teacher in Season 1 (whose writing class Phil had to attend in the episode "Tanner"), as well as Pim's teacher. Tanner Kirkpatrick ( Chris Hunter ) is a crush of Keely's in the episode "Your Cheatin' Heart" and was in the show most of the season.

  8. Breathing gas - Wikipedia

    en.wikipedia.org/wiki/Breathing_gas

    A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats such as scuba equipment, surface supplied diving equipment, recompression chambers, high-altitude mountaineering, high-flying aircraft, submarines ...