Fifty people were charged Tuesday in a scheme in which wealthy parents allegedly bribed college coaches and other insiders to get their children into some of the nation's most elite universities.

According to federal prosecutors, here is how the college admissions bribery scheme worked:

THE SCHEME

Parents of prospective students conspired with a college entrance consultant to beat the system and ensure their students were admitted or had a better chance to be admitted to certain colleges or universities, including Yale, Stanford, Texas, UCLA, USC, Wake Forest and others.

HOW

Prosecutors allege several methods were used including:

— Bribing those administering college entrance exams to provide answers, change answers or allow someone other than the student to take the exam and centers "controlled" by the consultant. Often students were told to declare a disability that would require they be given extra time, often a second day, to complete the exams.

— Bribing college coaches or athletic administrators to make it appear the students were athletes being recruited to the school, including creating fake athletic credentials.

— Having someone take classes in the place of a student and using those grades on applications.

HOW MUCH

— Between 2011-2018 prosecutors allege parents paid the consultant $25 million to bribe coaches and college administrators to designate their children as student athletes or member of other groups given favored admission status. Prosecutors say payments were often disguised as charitable donations that were then funneled to the coaches and administrators.

HOW OFTEN

— Prosecutors say the consultant represented to parents that the scheme had worked successfully more than 800 times.

WHO

— The consultant, William "Rick" Singer of Newport Beach, California pleaded guilty in Boston federal court on Tuesday to charges including racketeering conspiracy and obstruction of justice .

William 'Rick' Singer college admissions bribery
William 'Rick' Singer founder of the Edge College & Career Network, departs federal court in Boston on Tuesday, March 12, 2019, after he pleaded guilty to charges in a nationwide college admissions bribery scandal.
AP

— Nine coaches are accused, including former Yale women's soccer coach Rudy Meredith; UCLA soccer coach Jorge Salcedo, Wake Forest volleyball coach Bill Ferguson and Stanford sailing coach John Vandemoer.

John Vandemoer College Admissions-Bribery
John Vandemoer, former head sailing coach at Stanford, arrives at federal court in Boston on Tuesday, March 12, 2019, where he plead guilty to charges in a nationwide college admissions bribery scandal.
AP

— More than 30 parents are accused of paying bribes, including well-known actresses Felicity Huffman and Lori Loughlin and her husband, fashion designer Mossimo Giannulli.

College Admissions-Bribery
This combination photo shows actress Lori Loughlin at the Women's Cancer Research Fund's An Unforgettable Evening event in Beverly Hills, Calif., on Feb. 27, 2018, left, and actress Felicity Huffman at the 70th Primetime Emmy Awards in Los Angeles on Sept. 17, 2018. Loughlin and Huffman are among at least 40 people indicted in a sweeping college admissions bribery scandal. Both were charged with conspiracy to commit mail fraud and wire fraud in indictments unsealed Tuesday in federal court in Boston. (AP Photo)
AP

— No students were charged, prosecutors said they were often unaware of the measures being taken on their behalf.