CK-12 Biology Teacher's Edition complements the CK-12 Biology Student Edition FlexBook.

A work in progress, CK-12's Earth Science Honors For Middle School Teacher's Edition complements its Earth Science book on Earth: its minerals, energy resources, processes, past, water, weather, climate, environment, human actions, and astronomy.

CK-12 Life Science Honors For Middle School covers seven units: Understanding Living Things; Cells: The Building Blocks of Life; Genetics and Evolution; Prokaryotes, Protists, Fungi, and Plants; The Animal Kingdom; The Human Body; and Ecology.

The Natural Inquirer Climate Change series article Beetles are Supercool examines the life cycle of the mountain pine beetle and how climate change would influence this life cycle.

The Natural Inquirer Climate Change series article Where in the World is Carbon Dioxide explores how rising levels of carbon dioxide could impact United States forest.

The Natural Inquirer Climate Change series article It's a Gas explores the exchange of gases between the soil and atmosphere in tropical forests.

This lesson plan is for the Facts to the Future Edition of the Natural Inquirer

This lesson plan is for the Invasive Species Edition of the Natural Inquirer

The articles in this Natural Inquirer include just a few of the renewable natural resources studied by USDA Forest Service scientists. By reading these articles, you will learn about the condition of the resources in the year 2000, and you will learn what might happen to them by the year 2040. In the year 2040, how old will you be? Do you think that the condition of the Nation's renewable natural resources will be important to our society in 2040? Why or why not? The articles in this journal will help you to think about the future of global climate change, the Nation's wildlife, our fresh water, our fish, the trees that grow in our cities and towns, and the conditions that tell us whether our forests and rangelands are healthy. As you read the articles, remember that it is hard to predict the future. Although scientists do the best job they can, many things can change in the future. To find out more about our Nation's resources, read this Natural Inquirer!

In the Natural Inquirer Invasive Species Edition, you will learn about several different invasive species. You will learn about how these invasive species spread and the studies that scientists conduct to better understand and stop the spread of invasive species. After reading the Natural Inquirer's Invasive Species Edition, you will be able to help spread the word about what invasive species are and how to stop them! This edition can be ordered in either English or Spanish.

Do you like to discover new things? Are you interested in learning about nature? Then the Natural Inquirer is for you! This journal is full of new information on the natural environment that we call the Rocky Mountains. In this Natural Inquirer, you will learn how father owls feed their young, the dangers that songbirds sometimes face and how beetles stay warm during the winter. Find out how avalanches are formed, whether trout always pick the same place to swim in a stream and how a computer can be used to predict soil erosion! Have fun learning all about the Rocky Mountains!

What are urban forests? Urban forests are the trees and other plants that grow where people live, go to school, work, and play. Even if you live in a rural community, the trees in your yard, around buildings, and in parks are called urban forests. Calling them urban forests helps you to see that they are different from the kind of forests that grow in large undeveloped areas. Urban forests include trees in community parks and other public land, along streets, in neighborhoods, around businesses and industry, and just about everywhere in a community. You will find urban forests almost anywhere that you find people living, going to school, working, and playing. Urban forests provide many benefits to people and their communities.  Some examples of benefits include reducing noise and soil erosion and providing homes for animals.  To fins out more about urban forest and their benefits, read this Natural Inquirer!

Students get a chance to see pictures of the actual scientists that performed the science research in the journals. Scientists tell students about their favorite science experiences.

This lesson plan is for the Goldifinch and the Three Scales article in the Olympic Edition of the Natural Inquirer.

This lesson plan is for the Urban Forest Edition of the Natural Inquirer