The domino (also known as bones, cards, men or pieces) is a small rectangular tile with a value shown in one of its four corners. It may also be blank. The value on a domino is sometimes called its rank or weight, and the number of points it has is its count. Dominos are normally stacked so that the ends match each other, and a player may only play a domino on which both of its numbers match one another or else that has a matching value at either end of an existing domino chain.

Using dominoes to learn addition can be fun and engaging. To start, students should select a domino from the group of dominoes on the table and name its dots. The teacher should then write the corresponding equation on a piece of paper. For example, if the domino has the number 2 on one side and the number 4 on the other, the student should write 2 + 4 = 6.

When students complete this assignment, they can compare the results of their answers to those of their classmates. This is an excellent way to practice math skills while developing teamwork and fostering peer collaboration.

There are many different kinds of domino games, but the most basic is a two-player game with a double-six set of 28 tiles. These are shuffled together and placed face down on the table to form a stock or boneyard. Each player then draws seven dominoes from the stock and makes a line of play.

As the lines of play grow longer, it becomes more difficult to match up dominoes and keep them connected, especially when players try to use a single domino twice on the same turn. To prevent this, the smallest possible dominoes are often used at the beginning of a game. The most common game scoring is to count the open ends of dominoes and divide by five. For example, if an end has six plus four plus two, the score is three points.

Dominoes can also be used to build artistic creations such as curved lines, grids that form pictures, and 3D structures like towers and pyramids. Domino art can be extremely elaborate, with a lot of preparation and planning required. Professional domino artist Hevesh has built setups for movies, TV shows, and events, including a concert by singer Katy Perry. Her large-scale works can take several nail-biting minutes to fall, and can involve hundreds of thousands of dominoes.

The term domino is also used to refer to a domino effect, a chain reaction in a system that starts off with one small event and then leads to larger, potentially catastrophic events. It is often used in fiction and nonfiction to illustrate a larger point about the impact of one event on a series of other related events. It is also used to describe the influence of one person on the actions of others, and the ways that decisions or opinions affect a wider community.