Dialysis tubing in a solution to demonstrate osmosis

Diffusion and Osmosis

All cells are bound by some type of permeable or semipermeable membrane that governs the ions, small molecules, and large molecules that enter and leave the cell. Diffusion is the general process of movement down a gradient that results in equal concentrations of solutes on both sides of the membrane. When water is the molecule entering or leaving the cell the process is osmosis. This guide breaks down the important information students need to know, provides links to products and free digital resources, and includes suggestions for hands-on-labs that reinforce student learning.

Underwater scene

Marine Science

Marine science is one of the most popular science electives in high school and college. Its interdisciplinary structure requires students to integrate biology, chemistry, earth science, and physics making it a perfect addition to any science course sequence. This guide breaks down the important information students need to know, provides links to products and free digital resources, and includes suggestions for hands-on-labs that reinforce student learning.

Micrograph of onion root tip.

Mitosis and Meiosis

Carolina has everything you need to teach mitosis and meiosis. The processes of mitosis and meiosis are fundamental topics in biology. During these lessons, students learn how cells divide and pass along genetic information to new daughter cells. This knowledge is important as students advance their learning in genetics, inheritance, and diversity. However, the concepts can be difficult for students to understand because they aren’t commonly viewed processes.