This black cabinet was once stored in the gongkhang of an unknown temple in Tibet. Forbidden to the uninitiated, the gongkhang is a special room set aside for the worship of wrathful deities, where only the initiated monks of the...

The vajra (Tibetan: Dorjie) and bell (Sanskrit: ghanta; Tibetan: drilbu) are the most important ritual objects of Tibetan Buddhism. Most every lama has a pair and knows how to use them. They represent "method" (vajra) and "wisdom"...

This is an image of the goddess Durga. She is shown in a triumphant pose as the slayer of the buffalo demon, Mahisha. Durga is a manifestation of the Goddess, who can also appear as the consort Parvati or as a destructive figure Kali....

Learn about the origins of the Samurai, The First Warrior Government (The Kamakura Shogunate, 1185-1333, The Second Warrior Government: The Ashikaga Shogunate of the Muromachi Period (1338-1573), The Third Warrior Government: the...

Learn about some of the different computer file types.

Find out the basics of modular arithmetic.

After learning about algorithms, find out what to learn next.

A review of programming with JavaScript and ProcessingJS, and guidance of what to learn next.

Find out what to explore after learning and mastering jQuery.

Find out why computer programmers use jQuery to do form validation.

Find out about having both a fixed and a growth mindset talking to us and competing for our attention.

An overview of the 2020 AP Macroeconomics Exam Format

Some questions ask you to identify which scenario matches the principle in a passage. This type of question asks you to apply a principle or idea presented in the passage to a new context presented in the choices.

A reference page to learn about magnetic flux means and how to calculate it. Reference page includes explanation and exercise.

Do you know how to induce an electromotive force? This reference page will help you understand why Faraday's law mean and how to use it.

Centripetal motion can be a complex topic so use this website to review the key concepts, equations, and skills for centripetal motion. Also, the connection to centripetal acceleration is discussed here.

Solve advanced equations by strategically using quadratic factorization methods.

Solve geometry problems with various polygons by using all you know about similarity and congruence.

Given two similar triangles and some of their side lengths, find a missing side length.

Solve quadratic equations of the form (x+a)^2-b=0. These can be solved using square roots. For example, solve (x-5)$2-4=0.

Velocity or speed? Instantaneous or average? Keep building your physics vocabulary.

How to analyze graphs that relate velocity and time to acceleration and displacement.

Practice verifying whether algorithms are correct with empirical analysis and logical reasoning, in this set of free practice questions designed for AP Computer Science Principles students.

Practice variable assignment in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.