Mathispower4u
Evaluate An Expression Using The Order of Operation (Example 2)
What comes first, the exponents or the multiplication? Follow the order of operations and you will never make a mistake! Young scholars learn the order of operations and then watch as the instructor evaluates a five-step problem. The...
PBS
Biogeography: Where Life Lives
Biogeography is the study of the geographical distribution of plants and animals. NOVA's Evolution Lab explains how organisms on different continents can be so closely related. The resource discusses the processes that bring life from...
PBS
Evolution 101
Have you been shaped by evolution? A short video introduces the idea of evolution through examples of natural selection, reproduction, traits, and more. The video exists as a small part of a series from the NOVA Evolution Lab.
Mathispower4u
Translating Statements to Algebraic Expressions (Applications)
Math is like another language with a vocabulary all its own. Translating verbal statements to mathematic symbols is a challenging task for learners. The video instruction provides several examples viewers watch—and rewatch—to improve...
Mathispower4u
Write a Numerical Expression in the Form a-b and a(b+c) (Example)
To add or subtract ... how do you make the decision? The video instructor explains the process of writing a numerical expression from a verbal expression. While writing the expressions, he provides explanations for his decisions.
Mathispower4u
Writing Algebraic Expressions (Examples)
Express yourself! Using a table method, the lesson presentation explains how to convert a verbal expression into an algebraic expression. The examples include problems with a variety of operations.
Mathispower4u
Writing Algebraic Expressions
Turning words into symbols is a powerful way to use mathematics. A direct video lesson presents several word problems requiring an algebraic expression. After defining the variable, the presenter shows how to write an expression...
Mathispower4u
Introduction to Variables and Variable Expressions
Variable expressions can take many shapes and forms. Learners review the different components of many different variable expressions in a straightforward video lesson. After introducing vocabulary, the instructor uses context to write...
Mathispower4u
Evaluate An Expression Using The Order of Operations (Example 3)
Multiply, add, exponents, parentheses ... what do I do first!?! Young mathematicians watch as the video instructor works through a problem that includes all steps of the order of operations. Explanations help learners understand how...
Mathispower4u
Evaluate An Expression Using The Order of Operations (Example 1)
Introduce your classes to order of operations with a simple example. Showing how to apply the order of operations, the lesson presenter evaluates a two-step expression. Learners see how the order of operations affects the sequence of...
Mathispower4u
Evaluate Exponential Expressions (Example)
Exponents create the incredibly growing expression. A video instructor explains the expanding properties of the exponential expression. Expanding the expression helps pupils see how to simplify and evaluate.
Mathispower4u
Evaluating Algebraic Expressions
What types of mistakes do your classes make when evaluating algebraic expressions? A direct video lesson explains the process of evaluating algebraic expressions by substituting values for multiple variables. The instructor highlights...
PBS
Solving the Storage Problem
Clean, renewable energy is there for the taking ... how do we save it until we need it? A short video, part of an energy unit from NOVA, discusses the challenges of creating and storing electrical energy efficiently. The narrator...
PBS
Solar Power
One day's worth of sunlight can supply everyone on Earth with electricity for a year! Why, then, do we find ourselves in an energy crisis? Shine a light on solar energy with a short lesson and video. As part of a larger energy unit from...
PBS
Energy Defined
What is energy, and why do we need so much of it? Scholars explore the definition of energy as it relates to both conversion and consumption with a video and discussion questions. Part of an energy unit from NOVA, the resource provides a...
PBS
Toward a Smarter Grid
Did you realize that the latest innovations in technology get their electrical power from a system that's 100 years old? Help pupils make sense of the power grid using a short video and related questions. The lesson, part of NOVA's...
PBS
Wind Power
Wind power blows non-renewable sources away! Why are there not more wind power plants? Science sleuths track down the reasons behind our limited use of wind energy with a video from NOVA's energy unit. The resource covers the storage and...
PBS
Putting Energy to Use
From burning wood for heat to riding a bicycle, converting one form of energy into another is an everyday process! Using a video clip, learners discover the sources of the thermal, mechanical, and electrical energies that make our lives...
PBS
A Never-Ending Supply
If renewable energy means a never-ending supply of power, why aren't we already using it? A brief video clip, part of a large Energy unit from NOVA, discusses the limitless energy humans obtain from solar, geothermal, and tidal sources....
PBS
Growing Appetites, Limited Resources
Did you know that, as the world's population increases, its demand for energy increases at an even faster rate? Learners watch a short video about the world's energy crisis before discussing the sustainable alternative energy sources....
PBS
Solar Space Telescopes
See the sun shine as you've never seen it before! Captivate your class with an activity from NOVA's Sun Lab unit. Viewers learn about the advanced satellite-mounted telescopes NASA uses to monitor the sun at every wavelength of light,...
PBS
The Electromagnetic Spectrum
What can the electromagnetic spectrum tell us about the sun? As it turns out, quite a bit! See the sun in a whole new light with a video from NOVA's Sun Lab unit. The narrator describes the electromagnetic spectrum in terms of visible...
PBS
The Threat to Earth
Is Earth prepared for a massive solar storm? Examine the possibilities with an interesting activity, part of NOVA's Sun Lab interactive unit. Viewers learn about historical solar storms, the tools we have for protecting ourselves and...
PBS
Earth's Magnetic Shield
Our atmosphere is pretty amazing! How does it minimize the effects of solar weather? Scholars discover Earth's first line of defense against the sun—the magnetosphere. The activity, one of several in a sun unit from NOVA, explains how...