Definition of three tems

Education is teaching and learning skills and knowledge. Education also means helping people to learn how to do things and encouraging them to think about about what they learn. It is also important for educators to teach ways to find information and use it effectively.
There are three types of education:
Formal education: Usually in school, where a person may learn basic, academic, or trade skills. Formal education begins in elementary school and continues through secondary school. There is post-secondary education (or higher education, usually at a college or university.)
Nonformal education: Sometimes called adult basic education, adult literacy education or school equivalency preparation. In nonformal education an adult or out-of-school youth may learn literacy, other basic skills or livelihood skills. Nonformal education takes place in small classes, tutorials or through self-instruction.
Informal education: An example being a parent teaching a child how to make a meal. Someone could also get an education informally by reading many books from a library.

Bullying:
Bullying can exist on campus. School bullying now is one of the serious problems which cannot be ignored in school. In the times of information explosion, teenagers expose to a large number of both good and bad intermingled information. In addition, the vast majority of teenagers are easily influenced by what they saw and what they heard from television, films, and internet. Therefore, they may tend to imitate the behavior that threatens or harms other persons by verbal harassment, physical assault, or other more subtle ways.

Terrorism is the act of scaring people for a social or political reason using violence (or threat of violence). A person who uses terrorism is called a terrorist. Sometimes they do the things they say they will do, and sometimes they do not. Terrorists think that if others are afraid of them, they will have more power over other people.
Terrorists may also be trying to make their enemies into attacking the people whom the terrorists claim to represent. This will hopefully cause this population to be for the terrorists. For example, Palestinian Hamas terrorists killed Israeli civilians in bomb attacks, provoking Israel into carrying out revenge attacks against Palestinian civilians, thus increasing Palestinian hate for Israel and support for Hamas. An example of a well-known terrorist is Osama bin Laden, the founder of al-Qaeda and Abu Musab al-Zarqawi.