Courses
Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
8 courses
Meristematic and Permanent Tissues of Plants
Biology · High School (11–12) · Anatomy of Flowering Plants, Plant Tissues
FreeCh 6 · 1/3
Meristematic tissues that keep growing, and the permanent tissues made from them. The simple tissues: parenchyma, collenchyma and sclerenchyma. The complex tissues: xylem and phloem.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Tissue Systems and the Anatomy of Root, Stem and Leaf
Biology · High School (11–12) · Anatomy of Flowering Plants
FreeCh 6 · 2/3
The epidermal, ground and vascular tissue systems. Then the inner structure of a dicot and a monocot root, stem and leaf, and what tells them apart under the microscope.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Secondary Growth
Biology · High School (11–12) · Anatomy of Flowering Plants
FreeCh 6 · 3/3
How a stem and a root grow thicker. The vascular cambium and the cork cambium, annual rings, heartwood and sapwood, and the bark and lenticels of a tree.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Root, Stem and Leaf
Biology · High School (11–12) · Morphology of Flowering Plants
FreeCh 5 · 1/3
The tap root and fibrous root systems and the changes in roots for food, support and breathing. The stem and its modifications, and the leaf, its veins, its kinds and its modifications.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Inflorescence, Flower, Fruit and Seed
Biology · High School (11–12) · Morphology of Flowering Plants
FreeCh 5 · 2/3
How flowers are arranged on a plant, and the parts of a flower. Then aestivation, placentation, the kinds of fruit, and the structure of dicot and monocot seeds.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Describing Flowering Plants and Plant Families
Biology · High School (11–12) · Morphology of Flowering Plants
FreeCh 5 · 3/3
How a botanist describes a plant in a standard way, with a floral diagram and a floral formula. Then three families: Fabaceae, Solanaceae and Liliaceae.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Animal Tissues
Biology · High School (9–10), General · Animal Tissues
FreeCh 2 · 2/3
Your skin, your blood, your heart and your nerves are all made of cells, but of different kinds. Here we learn the four main tissues of animals, what each one does, and how to tell them apart.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Plant Tissues
Biology · High School (9–10), General · Plant Tissues
FreeCh 2 · 1/3
A tree stands for hundreds of years, and its trunk never stops growing. How? In this course we learn how plants grow, which tissues give them strength and food, and how water travels from the root to the leaf.
3Lessons10Problems2Python Labs1Question Set1Mock Test