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  2. Sandy Hook Elementary School shooting - Wikipedia

    en.wikipedia.org/wiki/Sandy_Hook_Elementary...

    The Sandy Hook Elementary School shooting was a mass shooting that occurred on December 14, 2012, in Newtown, Connecticut, United States, when 20-year-old Adam Lanza shot and killed 26 people. Twenty of the victims were children between six and seven years old, and the other six were adult staff members.

  3. District of Columbia Public Schools - Wikipedia

    en.wikipedia.org/wiki/District_of_Columbia...

    One example is implementing a requirement that students entering ninth grade sit down with a school counselor and construct a course plan to reach graduation. River Terrace Elementary School and Shaed Education Campus shut their doors at the end of the 2010–2011 and 2011–2012 school years, respectively.

  4. Primary education in the United States - Wikipedia

    en.wikipedia.org/wiki/Primary_education_in_the...

    Some private schools, and public schools, are offering pre-kindergarten (also known as pre-K) as part of elementary school. Twelve states (Alabama, Florida, Georgia, Iowa, New Jersey, New Mexico, New York, Oklahoma, West Virginia, Wisconsin, and Vermont) as well as the District of Columbia offer some form of universal pre-kindergarten according to the Education Commission of the States (ECS).

  5. Grade retention - Wikipedia

    en.wikipedia.org/wiki/Grade_retention

    Grade retention. Grade retention or grade repetition is the process of a student repeating a grade after failing the previous year. In the United States of America, grade retention can be used in kindergarten through to eleventh grade; however, students in high school are usually only retained in the specific failed subject.

  6. Bootstrapping (electronics) - Wikipedia

    en.wikipedia.org/wiki/Bootstrapping_(electronics)

    In the field of electronics, a technique where part of the output of a system is used at startup can be described as bootstrapping. A bootstrap circuit is one where part of the output of an amplifier stage is applied to the input, so as to alter the input impedance of the amplifier. When applied deliberately, the intention is usually to ...

  7. Escambia County School District - Wikipedia

    en.wikipedia.org/wiki/Escambia_County_School...

    Middle 9:20AM-4:15PM. High School 8AM-3PM. Website. www .escambia .k12 .fl .us. The Escambia County School District ( ECSD) is the organization responsible for the administration of public schools in all of Escambia County, Florida, in the United States. [2] The district currently administers 35 elementary schools, nine middle schools, and ...

  8. Elementary particle - Wikipedia

    en.wikipedia.org/wiki/Elementary_particle

    e. In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles. [1] The Standard Model presently recognizes seventeen distinct particles—twelve fermions and five bosons. As a consequence of flavor and color combinations and antimatter, the fermions and bosons are known to ...

  9. Home page - Wikipedia

    en.wikipedia.org/wiki/Home_page

    The small house-shaped button in the upper left is for the browser's start page. A home page (or homepage) is the main web page of a website. [1] The term may also refer to the start page shown in a web browser when the application first opens. [2] Usually, the home page is located at the root of the website's domain or subdomain.