Submitted as part of the California Learning Resource Network (CLRN) Phase 3 Digital Textbook Initiative (CA DTI3), CK-12 Foundation’s high school Biology FlexBook covers cell biology, genetics, evolution, ecology, botany, zoology, and physiology. This digital textbook was reviewed for its alignment with California content standards.

This learning activity is designed to give nursing students confidence and skill with calculating safe dose medication ranges used in the clinical setting. It is designed to supplement textbook and classroom information.

Spreadsheets Across the Curriculum activity. In advance of an actual lab activity, students virtually simulate the calibration of a laboratory micropipettor. QL: Accuracy and precision.

Learn about one town's conflict over the issue of spraying pesticides to combat disease-carrying insects, in this video segment from Greater Boston.

In this video segment adapted from NOVA scienceNOW, scientists discuss a family of genes called FOXO that can significantly extend life span in worms—and in humans.

Meet an agricultural inspector whose start as a beekeeper led him to a career as a county apiary inspector. Watch him inspect bee hives and you learn about the important connection between bee pollination and a healthy food supply for humans.

Meet a chemist who owns his own business that develops synthetic DNA molecules designed to reprogram cells and help cure diseases. Hear the importance of writing, communication skills and creativity to becoming a successful chemist.

Meet an environmental researcher who discovered as a young child his interest in the environment and now works to improve natural ecosystems in southeastern Ohio.

Look inside the business of farming with a real farmer who explains how he started with a 10-acre field and helped build a large family farm enterprise. Hear the importance of business skills and a college degree for success in a farming career.

Meet a guy who started as a curious kid, overcame his fear of chemistry class, discovered a cool career, and is now a food scientist who experiments with vegetables.

Open your eyes to the world of food safety with a food scientist in an ice cream factory. Learn how high school is the time to begin preparing for a rewarding career that keeps our food factories clean and consumers safe and healthy.

Two teachers at a multilingual immersion studies middle school talk about how they prepared for their careers and candidly share the challenges and rewards they have experienced in the classroom.

Hear from a forest services manager who leads projects for forest health and sustainability about the importance of learning math, science, writing and communication. Learn about the many careers available in the area of natural sciences.

See fascinating images of the human heart with a cardiac radiologist who looks closely at ultrasounds, MRIs, & CT scans to diagnose heart problems.

In this video segment from NatureScene, explore Cartwheel Bay, a wetland in South Carolina, and learn about the variety of carnivorous plants native to this unique landform.

In this video adapted from Texas Parks and Wildlife Department, learn about carnivorous plants that act as both producers and consumers in an ecosystem. See sundews and blatterworts capture and digest insects.

This interactive feature describes some of the most important structures and functions of the cell membrane.

Students will use these resources to learn about the various parts of plants and animal cells.

In this interactive activity adapted from the University of Nebraska, learn how and where transcription and translation occur within a cell and observe both processes in detail.

Cellular respiration is the process by which our bodies convert glucose from food into energy in the form of ATP (adenosine triphosphate). Start by exploring the ATP molecule in 3D, then use molecular models to take a step-by-step tour of the chemical reactants and products in the complex biological processes of glycolysis, the Krebs cycle, the Electron Transport Chain, and ATP synthesis. Follow atoms as they rearrange and become parts of other molecules and witness the production of high-energy ATP molecules.