User contributions for Mr. Goldstein

22:1222:12, 11 July 2025 diff hist +2,165 N 4.2.2.2 Binary Search Created page with "=== 4.2.2.2 Binary Search === ''(Difficulty Note: This is slightly more complex than Linear Search, as it requires sorted data.)'' '''Binary Search''' is a much faster way to find something, but it has a special rule: the list of items '''must be sorted''' (like numbers from smallest to largest, or words alphabetically). It works by repeatedly dividing the list in half. '''How it works:''' # Find the middle item in the sorted list. # Is the middle item the one you're..." current Tag: Visual edit
22:0822:08, 11 July 2025 diff hist +26 Main Page No edit summary Tag: Visual edit
22:0722:07, 11 July 2025 diff hist +1,599 N 4.2.2.1 Linear Search Created page with "=== 4.2.2.1 Linear Search === ''(Difficulty Note: This is a very intuitive and accessible concept for 7th graders.)'' '''Linear Search''' is the simplest way to find something. It's like looking for a book in a messy pile without any order. You start at the very beginning of the list of items and check each item one by one until you find what you're looking for, or until you reach the end of the list. '''How it works:''' # Start at the first item. # Is this the item y..." current Tag: Visual edit
22:0222:02, 11 July 2025 diff hist +31 Main Page No edit summary Tag: Visual edit
22:0222:02, 11 July 2025 diff hist +896 N 4.2.2 Searching Algorithms Created page with "== 4.2.2 Searching Algorithms == Imagine you have a huge pile of papers, and you're looking for one specific paper with your name on it. How do you find it? You use a '''searching algorithm'''! In computer science, searching algorithms are step-by-step methods that computers use to find a specific piece of information within a larger collection of data. '''Bibliography:''' * '''Searching Algorithm.''' (n.d.). ''GeeksforGeeks''. Retrieved July 11, 2025, from https://www..." current Tag: Visual edit
21:5121:51, 11 July 2025 diff hist +1,358 1.5 How a Computer Works No edit summary Tag: Visual edit
21:1321:13, 11 July 2025 diff hist −210 1.5 How a Computer Works No edit summary Tag: Visual edit
21:0821:08, 11 July 2025 diff hist +1,694 1.5 How a Computer Works No edit summary Tag: Visual edit
21:0021:00, 11 July 2025 diff hist 0 1.5 How a Computer Works No edit summary Tag: Visual edit
20:5920:59, 11 July 2025 diff hist 0 1.5 How a Computer Works No edit summary Tag: Visual edit
20:5820:58, 11 July 2025 diff hist 0 1.5 How a Computer Works No edit summary Tag: Visual edit
20:5620:56, 11 July 2025 diff hist +178 1.5 How a Computer Works No edit summary Tag: Visual edit
19:4719:47, 11 July 2025 diff hist +167 1.5 How a Computer Works No edit summary Tag: Visual edit
19:3819:38, 11 July 2025 diff hist +120 Main Page →1.5 How a Computer Works Tag: Visual edit
19:3419:34, 11 July 2025 diff hist +39 1.5 How a Computer Works No edit summary Tag: Visual edit
19:3019:30, 11 July 2025 diff hist −115 1.5 How a Computer Works No edit summary Tag: Visual edit
19:0319:03, 11 July 2025 diff hist +14 1.5 How a Computer Works No edit summary Tag: Visual edit
18:5418:54, 11 July 2025 diff hist −112 1.5 How a Computer Works No edit summary Tag: Visual edit
18:3718:37, 11 July 2025 diff hist +11,712 N 1.5 How a Computer Works Created page with "== How a Computer Works: The Grand Tour! == Imagine a computer isn't just a mysterious box, but a super-smart factory or a busy team of specialized workers. To understand how it works, we're going to take a tour of its most important parts and see how they all work together to make magic happen! At its heart, a computer is a machine that takes in information (input), processes it, stores it, and then gives you back results (output). It's all about following instructions..." Tag: Visual edit
18:3618:36, 11 July 2025 diff hist +34 Main Page →1.0 Introduction to Computer Science Tag: Visual edit
18:3018:30, 11 July 2025 diff hist +11,698 N 5.6 How a Computer Works Created page with "== How a Computer Works: The Grand Tour! == Imagine a computer isn't just a mysterious box, but a super-smart factory or a busy team of specialized workers. To understand how it works, we're going to take a tour of its most important parts and see how they all work together to make magic happen! At its heart, a computer is a machine that takes in information (input), processes it, stores it, and then gives you back results (output). It's all about following instructions..." current Tag: Visual edit
18:2318:23, 11 July 2025 diff hist +27 Main Page No edit summary Tag: Visual edit
18:1518:15, 11 July 2025 diff hist +65 Main Page No edit summary Tag: Visual edit
18:1418:14, 11 July 2025 diff hist +2,073 N 7.3.1 Creating Images (drawing, 3D models - simple concepts) Created page with "==== 7.3.1 Creating Images (drawing, 3D models - simple concepts) ==== Computers create images in a couple of main ways: * '''Vector Graphics:''' Imagine drawing with lines, curves, and shapes that are defined by mathematical formulas. This is how '''vector graphics''' work. Instead of remembering every pixel, the computer remembers the instructions for drawing the shapes (e.g., "draw a red circle at these coordinates with this radius"). ** '''Pros:''' Vector graphics c..." current Tag: Visual edit
18:0318:03, 11 July 2025 diff hist +24 Main Page No edit summary Tag: Visual edit
18:0218:02, 11 July 2025 diff hist +264 N 7.3 Computer Graphics: Making Digital Art Created page with "=== 7.3 Computer Graphics: Making Digital Art === Computer graphics isn't just about looking at pictures; it's also about creating them! This field uses computer programs and mathematical calculations to make images, shapes, and entire virtual worlds from scratch." current Tag: Visual edit
16:4516:45, 11 July 2025 diff hist +54 Main Page No edit summary Tag: Visual edit
16:4416:44, 11 July 2025 diff hist +1,222 N 7.2.3 GIF (for simple animations, limited colors) Created page with "==== 7.2.3 GIF (for simple animations, limited colors) ==== * '''What it is:''' GIF (Graphics Interchange Format) is a unique image format known for its ability to show simple animations. * '''How it works:''' Like PNG, GIF uses lossless compression, but it's limited to only 256 colors. This means it can't show as many colors as a JPG or PNG. However, it can store multiple images in one file and play them in a sequence, creating a short, looping animation. * '''Best for..." current Tag: Visual edit
16:4016:40, 11 July 2025 diff hist +43 Main Page No edit summary Tag: Visual edit
16:3916:39, 11 July 2025 diff hist +1,222 N 7.2.2 PNG (for graphics, transparency) Created page with "==== 7.2.2 PNG (for graphics, transparency) ==== * '''What it is:''' PNG (Portable Network Graphics) is another very popular image format, especially for web graphics and logos. * '''How it works:''' PNG uses "lossless compression." This means that when you save an image as a PNG, no information is lost, and the image quality remains perfect, no matter how many times you save it. * '''Best for:''' Images with sharp lines, blocks of solid color, text, and especially imag..." current Tag: Visual edit
16:3316:33, 11 July 2025 diff hist +27 Main Page No edit summary Tag: Visual edit
16:3216:32, 11 July 2025 diff hist +1,258 N 7.2.1 JPG (for photos) Created page with "==== 7.2.1 JPG (for photos) ==== * '''What it is:''' JPG (or JPEG, Joint Photographic Experts Group) is one of the most common image formats, especially for photographs. * '''How it works:''' JPG uses a "lossy compression" method. This means when you save a photo as a JPG, it actually throws away some information that your eyes probably won't notice, making the file size much smaller. The more you compress it, the smaller the file, but the more quality you lose. * '''Be..." current Tag: Visual edit
16:3216:32, 11 July 2025 diff hist +27 Main Page No edit summary Tag: Visual edit
14:2314:23, 11 July 2025 diff hist 0 7.2 Image File Formats No edit summary current Tag: Visual edit
14:2314:23, 11 July 2025 diff hist +382 N 7.2 Image File Formats Created page with "=== 8.2 Image File Formats === Digital images can take up a lot of space! To make them easier to store, send over the internet, and display quickly, they are saved in different '''file formats'''. Each format has its own strengths and weaknesses. Think of them like different ways to pack your clothes for a trip – some are better for saving space, others for keeping things neat." Tag: Visual edit
14:2214:22, 11 July 2025 diff hist +52 Main Page No edit summary Tag: Visual edit
14:2014:20, 11 July 2025 diff hist +1,553 N 7.1.2 How Computers See Color (RGB, basic idea) Created page with "==== 7.1.2 How Computers See Color (RGB, basic idea) ==== How does a computer know what color each pixel should be? It's all done with numbers! The most common way computers represent colors is using the '''RGB''' model. RGB stands for '''Red, Green, and Blue'''. These are called "additive primary colors" because when you mix different amounts of light of these three colors, you can create almost any other color. * Each pixel's color is defined by how much red, how muc..." current Tag: Visual edit
13:5713:57, 11 July 2025 diff hist +32 Main Page No edit summary Tag: Visual edit
13:5713:57, 11 July 2025 diff hist +1,451 N 7.1.1 Pixels and Resolution Created page with "==== 7.1.1 Pixels and Resolution ==== Imagine a giant LEGO board. Each individual LEGO brick is like a '''pixel''' (short for "picture element"). A digital image is made up of millions of these tiny square dots, arranged in a grid. Each pixel is a single point of color. * '''Pixels:''' If you zoom in really close on a digital photo, you'll eventually see these individual squares. The more pixels an image has, the more detail it can show, and the smoother it will look. *..." current Tag: Visual edit
13:3313:33, 11 July 2025 diff hist +33 Main Page No edit summary Tag: Visual edit
13:0213:02, 11 July 2025 diff hist +22 Main Page No edit summary Tag: Visual edit
13:0113:01, 11 July 2025 diff hist 0 7.0 Images & Graphics →7.0 Images & Graphics current Tag: Visual edit
13:0113:01, 11 July 2025 diff hist 0 7.1 What is a Digital Image? →8.1 What is a Digital Image? current Tag: Visual edit
13:0013:00, 11 July 2025 diff hist +250 N 7.1 What is a Digital Image? Created page with "=== 8.1 What is a Digital Image? === Before a computer can show you a picture, it needs to understand what that picture is made of. Unlike a painting on canvas, a digital image isn't smooth and continuous. It's actually made up of tiny little pieces!" Tag: Visual edit
13:0013:00, 11 July 2025 diff hist +26 Main Page No edit summary Tag: Visual edit
12:5912:59, 11 July 2025 diff hist +956 N 7.0 Images & Graphics Created page with "== 8.0 Images & Graphics == Imagine all the pictures, videos, and animations you see on your computer, phone, or in video games. They don't magically appear! Computers need special ways to understand, create, and show these visuals. The area of computer science that deals with creating and manipulating visual content is called '''Computer Graphics'''. It's how computers turn numbers and code into the amazing images we see every day. '''Bibliography:''' * '''Computer Gr..." Tag: Visual edit
12:4512:45, 11 July 2025 diff hist +62 Main Page No edit summary Tag: Visual edit
12:4412:44, 11 July 2025 diff hist +1,964 N 6.5.2 Deadlock Prevention, Avoidance, Detection, Recovery Created page with "==== 6.5.2 Deadlock Prevention, Avoidance, Detection, Recovery ==== ''(Difficulty Note: The names of these strategies are the key, the how is too complex.)'' The OS has strategies to try and deal with deadlocks. It's like how a city manages traffic to prevent gridlock: * '''Deadlock Prevention:''' This means designing the system so that one of the four conditions for deadlock can ''never'' happen. For example, by making sure processes always ask for ''all'' the resourc..." current Tag: Visual edit
12:3912:39, 11 July 2025 diff hist +34 Main Page No edit summary Tag: Visual edit
12:3912:39, 11 July 2025 diff hist +1,647 N 6.5.1 Conditions for Deadlock Created page with "==== 6.5.1 Conditions for Deadlock ==== ''(Difficulty Note: These are technical conditions. Focus on the core idea of "all waiting for each other.")'' Imagine a situation where two cars (processes) are trying to cross a narrow bridge (resource). If both cars enter the bridge from opposite directions at the same time, they get stuck, and neither can move forward. This is a simple deadlock. For a deadlock to happen, four conditions usually need to be met at the same time..." current Tag: Visual edit

11 July 2025