'Do not just teach your children to read. Teach them to question what they read. Teach them to question everything.' - George Carlin

High School Sciences


Biology is the study of life. Biologists study the structure, function, growth, origin, evolution, distribution and interaction of living organisms with their environment. Tensai offers a unique student-oriented simplified approach that enables students to develop a full understanding of the subject and the ways in which biology influences their quality of life, medicine, agriculture and food and the environment.
Start the free online Biology course now.


Chemistry is the study of the composition, structure and properties of matter at the atomic and molecular level, including change through chemical reactions. Tensai's chemistry course covers eight subjects utilizing a simplified approach providing a good foundation for students planning to pursue advanced college chemistry programs.
Start the free online Chemistry course now.


Physics is the study of matter and its motion in space (spatial) and time (temporal), including concepts such as force, energy, mass, and charge. The Tensai physics course uses simplified illustrations of physics concepts covering nine subject areas that are common in all high schools.
Start the free online Physics course now.

Review and Questions

Tensai offers an ever expanding database of over a hundred questions in each subject area in each of the three science courses. Questions are obtained from teachers currently teaching these subject areas from across the world.
Access the review questions here.

Study Tips

High school students are not only required to remember the concepts they have learnt but are expected to use these concepts to pass their exams and tests. Tensai provides a collection of several study tips and articles that show science based approaches to enhance study techniques.
Access several articles on study techniques here.