Undergraduate Studies: This level of study includes programs that lead to a bachelor's degree, which is typically completed in four years.  Students may choose to study a wide range of subjects, including liberal arts, sciences, engineering, business, and more.

Graduate Studies: This level of study includes programs that lead to a master's degree, doctoral degree, or other specialized graduate degrees. A typical master's degree program in the US takes two years to complete. However, A doctoral degree program in the US typically takes 5-7 years to complete,

Professional Studies: This level of study includes programs that lead to professional degrees such as law, medicine, dentistry, and other health professions.

Certificate Programs: Certificate programs are shorter, non-degree programs that provide specialized training in a particular area. These programs may take several months to a year to complete.

US universities and colleges require students to have a minimum GPA (Grade Point Average) of 2.5 or higher on a 4.0 scale or 50%. However, some institutions may require a higher GPA, such as a 3.0 or 3.5.

In addition to GPA, US universities and colleges may also consider other factors such as standardized test scores, extracurricular activities, essays, and letters of recommendation when making admission decisions.

1. Undergraduate: To be admitted to a college or university, students need to have completed high school or an equivalent program, and have taken the SAT or ACT. Each institution may have additional requirements, such as a certain GPA or specific courses completed in high school. 
2. Graduate: Admission to graduate school typically requires a bachelor's degree and a certain GPA. Some programs may also require standardized tests like the GRE or GMAT. Graduate programs often have specific prerequisites, such as a certain number of undergraduate courses in a particular field. 
3. Professional: Professional programs, such as law or medical school, have specific requirements in addition to undergraduate coursework. For example, law school typically requires the LSAT, and medical school requires the MCAT.

1. Fall Intake: Main Intake - Starts in August or September. The application deadline for the fall semester is typically around January to March of the same year.
2. Spring Intake: Second main intake - Starts in January or February. The application deadline for the spring semester is typically around September to October of the previous year.
3. Summer Intake: Some universities may offer a summer session or a winter session. These sessions are generally shorter in duration and may offer fewer courses than the regular semesters. 

It is recommended that international students apply as early as possible to ensure they have enough time to prepare for the admission process and obtain their student visa. International students may also need to plan ahead for any required English language proficiency tests or standardized tests such as the SAT or ACT.

The most commonly accepted English language proficiency tests in the US include:

1. TOEFL (Test of English as a Foreign Language)
2. IELTS (International English Language Testing System)
3. Duolingo English Test:
4. PTE (Pearson Test of English)

• High school diploma or equivalent (for undergraduate programs) or bachelor's degree or equivalent (for graduate programs)
• Official transcripts of all previous academic work
• Language proficiency test scores (such as TOEFL or IELTS)
• Standardized test scores (such as SAT or ACT for undergraduate programs or GRE or GMAT for graduate programs)
• Passport or other form of identification
• Curriculum vitae (CV) or resume
• Personal statement or essay
• Letters of recommendation
• Application fee
• Any additional documents required by the specific program or university, such as a portfolio for art and design programs.