# Scratch

Blockly Games. Ellipse Equation. An ellipse can be defined as the locus of all points that satisfy the equations x = a cos t y = b sin t where: x,y are the coordinates of any point on the ellipse, a, b are the radius on the x and y axes respectively, ( *See radii notes below ) t is the parameter, which ranges from 0 to 2π radians.

This equation is very similar to the one used to define a circle, and much of the discussion is omitted here to avoid duplication. See Parametric equation of a circle as an introduction to this topic. Aprendiendo Scratch. Learn Scratch. Scratch for CS. By David J.

Malan <malan@post.harvard.edu> Table of Contents IntroductionStatementsBoolean ExpressionsConditionsLoopsVariablesThreadsEventsOscartimeOscartime's Instructions SpriteOscartime's Trash SpriteOscartime's Oscar SpriteConclusion Introduction Most programming languages, on first glance, "look like Greek" to the untrained eye, an amalgam of English and unusual syntax. Class Hello { public static void main(String [] args) { System.out.println("hello, world! ") All the program above does, when executed, is display "hello, world! " Suffice it to say that, when it comes to learning to program, there's quite a learning curve with languages like Java. Learning to program is ultimately about learning to think logically and to approach problems methodically. For many students, the seemingly cryptic syntax of languages like Java tends to get in the way of mastery of such relatively simple constructs as these.

We turn our attention first to statements. Statements Boolean Expressions Conditions. Problem Solving & Critical Thinking with Scratch. 21st Century Skills Addressed Using Scratch from MIT Students across the world are using computers to develop a host of twenty-first century skills.

One of the tools being deployed in classrooms and in after school computer clubs is Scratch, from the Lifelong Kindergarten Group at the MIT Media Lab in Cambridge, Massachusetts. Specifically, Scratch is a media creation tool which allows students to easily create animations, stories, and interactive games. Connected Learning.

Guía de Scratch 2.0. Sin lugar a dudas, Scratch es el entorno de programación de computadores que más resultados ha cosechado en la educación escolar.

Así lo demuestra la contundente cifra de 3’289.354 proyectos elaborados con esta herramienta y publicados en su sitio web ( por 1’525.118 docentes y estudiantes de todo el mundo (datos a Abril 28, 2013). Scratch se lanzó oficialmente en Mayo de 2007 e inicialmente tuvo amplia acogida entre quienes venían trabajando con alguna de las versiones de Logo [1]. Pero, en muy corto tiempo, su adudiencia se amplió y consiguió cautivar a docentes de todo el planeta que comenzaron a usarlo en sus clases. Making Games in the Classroom. Scratch Getting Started. Scratch online. Let Go, Tarzan! Tarzan may have skillfully swung across the jungle on vines, but the same physics behind his artful motions also explain the worst belly flops at your local rope swing.

So whether you're looking to dodge venomous snakes or make a big splash at the lake, you need to know the precise moment to let go of your swing. For the greatest horizontal distance, you might think a 45 degree angle would always work (when ignoring wind resistance). You'd be wrong, though. Swinging from a pendulum, like a rope swing or hanging vine, is a little more complicated than your classic cannon ball projectile motion. Talk:Artificial Intelligence.