How to solve word problems using point-slope form of a line. Typically, students are very comfortable using slope-intercept form of an equation, but we rarely see examples where using point-slope form is the most efficient. In this...

Algebra 1 STAAR/EOC released test questions. These are practice problems meant to help you review and practice as you prepare for your STAAR test / EOC test for Algebra 1 (Texas). Readiness standard: A3C - graph linear functions on the...

We all know the Pythagorean Theorem, but what can we conclude if a^2 + b^2 is NOT equal to c^2?

Learn how to access a particular row or col in a 2D array

Learn how to initialize and access data in a 2D Matrix in MATLAB.

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Rap song all about simple sentences

Learn how to connect an Operational Amplifier in the Non-Inverting Configuration. Review the Op-Am Golden Rules and apply them the correct way. Op-Amp Amplifier Design. Electronics 101.

Explore the beautiful traditions of the Day of the Dead, or Día de los Muertos, a special time in Mexico to remember and honor loved ones who have passed away. Learn how families build colorful altars, decorate with marigolds, and share...

Drones, or UAVs (Unmanned Aerial Vehicles), have come a long way since their early days. In this episode, we explore their history, starting with the first unmanned balloons used in war, to the advanced drones used today for photography,...

Memorial Day is a special time to remember the brave men and women who gave their lives serving in the military. This holiday began after the Civil War and has grown into a day of parades, flags, and moments of quiet respect. We’ll learn...

Dive into one of the most intense battles of World War II—the Battle of the Bulge. In this video, we break down how, in December 1944, Nazi Germany launched a surprise attack against Allied forces in the snowy forests of Belgium. Learn...

Let’s meet the powerful gods of ancient Egypt! These gods were part of everyday life for the Egyptians. In this episode, we’ll learn about Ra, the sun god who sailed across the sky, and Osiris, the ruler of the afterlife. We’ll meet...

Discover the story behind the Louisiana Purchase, one of the most important land deals in American history. In this video, we explain how the United States bought a huge amount of territory from France in 1803, doubling the size of the...

The cell cycle is a highly regulated process of eukaryotic cell division involving interphase (G1, S, G2 phases) for growth and DNA replication, followed by mitosis for chromosome segregation and cell division. Progression through the...

Glycolysis is the cytoplasmic process of breaking down one glucose molecule into two pyruvate molecules, producing a net gain of 2 ATP, 2 NADH, and 2 water molecules. It functions with or without oxygen—serving as the first step in...

Amino acids are the building blocks of proteins, each composed of a central (alpha) carbon bonded to a hydrogen atom, amino group, carboxyl group, and a variable "R" group that defines its properties. Out of hundreds found in nature, 20...

In eukaryotes, the citric acid cycle takes place in the matrix of the mitochondria, just like the conversion of pyruvate to acetyl \text{CoA}CoAC, o, A. In prokaryotes, these steps both take place in the cytoplasm. The citric acid cycle...

DNA (Deoxyribonucleic acid) carries the genetic instructions for an organism's growth, development, and reproduction, encoded by sequences of four nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). These bases form...

A complementation test (or cis-trans test) is used to determine whether two recessive mutations causing the same phenotype occur in the same gene or in different genes. In the trans configuration, if the mutations are on different genes,...

This video explains a small trick to solve any direction sense problem correctly within one minute.

Taxonomy is the practice of categorizing and naming of species. The official "scientific name" of an organism consists of its Genus and its Species Identifier in a naming system called binomial nomenclature. The current taxonomic system...