More than 90 percent of chemical products are made using a catalyst. Lesson demonstrates the way a catalyst changes the rate of reaction without altering the chemical reaction. A catalyst doesn't appear as a reactant or a product, yet it...

The third instructional activity in a series of 11 begins by using thermal decomposition of potassium chlorate to determine the mass percent of oxygen. Then a second activity allows scholars to demonstrate that the resulting residue is...

Recycled Russian nuclear weapons provide 10 percent of the nuclear energy that the United States uses. The short presentation discusses the Teller-Ulam device. It provides a diagram of the parts as well as a description of the four...

Does the crystal structure of a hydrated solid determine the proportion of water absorbed, or does the application of heat change the absorption? Scholars experiment with both variables to determine the answer. They add their collected...

There is 30 percent more carbon in the atmosphere today than there was 150 years ago. The first lesson in the four-part series teaches classes about the carbon cycle. Over two to three days, classes make a model of the cycle,...

Control the spread of a contagious disease. An applet allows pupils to run a simulation on the spread of a disease. Rules govern how the disease is spread and the length of time it takes to recover. Learners view the spread visually and...

What do you have in common with a fruit fly? About 60 percent of your DNA. The resource, divided into two units, is intended for grades four to eight and another for high schoolers. Both units include eight lessons covering the...

Pairs simulate the energy usage of different countries by drawing beads from a bag, which contain different beginning ratios of non-renewable and renewable energy resources. The activity concludes with a series of questions to tie...

Wow! This is one of the most exhaustive presentations on finding chemical formulas that you will come across! Beginning with the basics, and leaving junior chemists with procedures and concrete examples, this PowerPoint certainly...

In this percent yield worksheet, high schoolers solve 4 problems. They find the percent yield given the chemical reaction, the mass of the reactants and the mass of the products. Given the percent yield students find the liters of a...

In this percent composition worksheet, students find the percentages of atoms in compounds and they determine empirical formulas given the percent of each atom in a compound.

Approximately 50 percent of people in the world who are chronically hungry work in agriculture. While it seems counter-intuitive, the farther you live from a farm, the more food options are available. Scholars explore concepts related to...

My body is my castle. Pupils learn about the innate immune system in the second lesson plan of a three-part unit on the immune system by comparing the innate immune system to a castle and moat. Groups conduct a simulation where they try...

Over a period of 35 years, earthquakes and volcanoes combined only accounted for 1.5 percent of the deaths from natural disasters in the United States. The 15th lesson in a 20-part series connects the locations of earthquakes and...

Time to come clean! Scholars continue preparing the shampoo they created in the previous two lessons. The purpose of this stage is to calculate the perfect amount of additive to make the shampoo lather. 

Scholars answer 10 multiple choice questions to test their knowledge about the human body and microbes. Correct answers come with a rewarding tone and brief description.

Which modification is the best? Using the scientific method, pairs determine the effects of each control surface on the distance of a glider's flight. The activity, section 16 in a 22-part unit on aviation, allows pupils to gain a better...

Do you have mole problems? If so, call Avogadro at 602-2140. The instructional activity starts with pupils working independently to solve for molar mass of ionic compounds. Then they learn to solve for percent composition and later...

Here's a stat for your pupils: 18 percent of the human body is carbon! Part 10 in the series of 12 takes pairs on an adventure through the carbon cycle. After a class reading about carbon, pairs read and choose their own adventure...

For some people, the force of addiction can be as biologically compelling as the drive for food or water. High schoolers watch a video segment about Ryan, a recovering addict, and learn more about how opioids and other drugs can affect...

Many types of cancer treatments now depend on nanotechnology—a big "little" discovery. Scholars begin by removing "malignant" tissue from simulated brains, one using fluorescent markers thanks to nanotechnology and one without. This...

Did you realize the visible light spectrum is less than three percent of the electromagnetic spectrum? A hands-onlesson includes five activities and experiments for scholars to explore and discover many advanced science concepts. They...

Have you ever wondered what type of AP Physics investigations The College Board wants? This is the guide for you! Sixteen labs covering both Physics I and II will get you started and inspire you to meet the requirement of 25 percent of...

Nuclear power provides about 20 percent of the energy generated in the United States. The seventh activity in the series of 12 tackles nuclear power. After sharing what they know about nuclear energy, scholars complete a...