Recent Posts

Title Description Creator created Image
Evaluate expressions involving addition and subtraction. To evaluate (find the value of) expressions written in horizontal form that involve addition and subtraction, we perform the operations as they occur from left to right Dr. Osama M. Khaled Nov 04, 2025 07:52 PM
Solve application problems by subtracting whole numbers To answer questions about how much more or how many more, we use subtraction Dr. Osama M. Khaled Nov 04, 2025 07:27 AM
Estimate differences of whole numbers Estimation is used to find an approximate answer to a problem Dr. Osama M. Khaled Nov 03, 2025 09:02 AM
Queue Simulator (FIFO) A Queue Simulator that visually demonstrates FIFO operations (enqueue, dequeue, peek, etc.) with animations, a centered info panel explaining the concept, and full responsiveness for mobile and desktop. Dr. Osama M. Khaled Nov 01, 2025 03:05 AM Queue Simulator (FIFO)
Interactive Stack Simulator A responsive, interactive stack simulator that visually demonstrates all stack operations, errors, and concepts with animations and an informational help panel. Dr. Osama M. Khaled Oct 31, 2025 11:20 PM Interactive Stack Simulator
Check subtraction using addition To describe the special relationship between addition and subtraction, we say that they are inverse operations Dr. Osama M. Khaled Oct 31, 2025 08:42 AM
Subtract whole numbers with borrowing If the subtraction of the digits in any place value column requires that we subtract a larger digit from a smaller digit, we must borrow or regroup Dr. Osama M. Khaled Oct 30, 2025 07:13 AM
Subtract whole numbers To subtract two whole numbers, think of taking away objects from a set. For example, if we start with a set of 9 stars and take away a set of 4 stars, a set of 5 stars is left. Dr. Osama M. Khaled Oct 29, 2025 11:20 AM
Use the converse of the Pythagorean theorem The converses of some statements are true, while the converses of other statements are false. It is interesting to note that the converse of the Pythagorean theorem is true. Dr. Osama M. Khaled Oct 27, 2025 09:30 PM
Use the Pythagorean theorem to find the exact length of a side of a right triangle If we know the lengths of any two sides of a right triangle, we can find the length of the third side using the Pythagorean theorem. Dr. Osama M. Khaled Oct 20, 2025 08:33 PM
Find unknown angle measures of triangles If you draw several triangles and carefully measure each angle with a protractor, you will find that the sum of the angle measures of each triangle is 180° Dr. Osama M. Khaled Oct 18, 2025 08:16 AM
Identify isosceles triangles In an isosceles triangle, the angles opposite the sides of equal length are called base angles, the sides of equal length form the vertex angle, and the third side is called the base. Dr. Osama M. Khaled Oct 17, 2025 09:40 PM
Classify triangles A triangle is a polygon with three sides (and three vertices) Dr. Osama M. Khaled Oct 16, 2025 11:04 AM
Classify polygons A polygon is a closed geometric figure with at least three line segments for its sides Dr. Osama M. Khaled Oct 12, 2025 12:24 AM
DNA Analyzer Paste a DNA sequence below to detect ORFs and restriction enzyme sites. Dr. Osama M. Khaled Sep 21, 2025 05:04 AM DNA Analyzer
AWS Certified AI Practitioner Practice Exam A comprehensive set of practice questions to prepare the AWS AI practitioner exam Dr. Osama M. Khaled Sep 11, 2025 02:49 AM
Force Diagram Creator Dr. Osama M. Khaled Sep 09, 2025 07:45 AM Force Diagram Creator
Advantages of using a DMBS approach Some advantages that a good DMBS can provide to a software solution Dr. Osama M. Khaled Sep 04, 2025 09:36 PM
Review of Sorting Algorithms This guide provides a clear, structured overview of essential sorting algorithms, breaking them down into intuitive categories based on their performance and ideal use cases. Dr. Osama M. Khaled Sep 02, 2025 06:38 AM
Sorting Algorithms Visual Lab This tool is designed to provide a hands-on understanding of sorting algorithms through interactive visualization. It is not intended for sorting your input data for practical use. You can select various algorithms to compare their performance and behavior. Dr. Osama M. Khaled Sep 01, 2025 07:17 AM Sorting Algorithms Visual Lab
Database Actors in the Scene We identify the people whose jobs involve the day-to-day use of a large database but no actively interested in the content of the database. Dr. Osama M. Khaled Aug 31, 2025 04:16 AM
Code To Architecture Diagram Use this awesome tool to write your diagram code in Python and render to an image. Dr. Osama M. Khaled Aug 25, 2025 09:29 PM Code To Architecture Diagram
Buoyancy An object in a fluid is buoyed up by a force equal to the weight of the fluid displaced Dr. Osama M. Khaled Jul 23, 2025 09:10 PM
Pressure in a liquid Pressure in a liquid increases with depth below the surface Dr. Osama M. Khaled Jul 16, 2025 11:23 AM
Molecules in a liquid A liquid is distinguished from a solid in that a liquid flows to fill the bottom of a container until the liquid has a level surface. Dr. Osama M. Khaled Jul 15, 2025 11:18 AM
Comparing small quantities without counting Tailored questions for preschool kids to recognize small quantities without counting Dr. Osama M. Khaled Jul 08, 2025 07:10 AM Comparing small quantities without counting
Connect number names from 1 to 20 Match the number names with the numbers Dr. Osama M. Khaled Jun 30, 2025 10:37 AM Connect number names from 1 to 20
Identify numbers from 1 to 20 in the stories Read the short stories and identify the numbers in any form Dr. Osama M. Khaled Jun 25, 2025 11:05 PM Identify numbers from 1 to 20 in the stories
Counting from 0 to 10 Counting things is where you start to learn about numbers Dr. Osama M. Khaled Jun 17, 2025 10:09 PM Counting from 0 to 10
Geometric 2D Shapes Calculator The Geometric Shapes Calculator is an interactive web-based tool designed to help users compute various properties of geometric shapes, including area, perimeter, diagonal, and other relevant measurements. It provides real-time visualization of shapes with dynamically updated dimensions and renders mathematical formulas in LaTeX for clarity. Dr. Osama M. Khaled Jun 15, 2025 01:18 AM Geometric 2D Shapes Calculator