Audio CDs for English listening practice are sold, as of 2015, at retail websites like Amazon.com, Barron's Educational Services and Wordery. These websites sell some of the many English listening practice CDs available from educational publishers such as Barron's, Kaplan and Oxford University Press.
English listening practice audio CDs are typically packaged with textbooks that aim to teach English as a second language. They range in price from $35 to $237 for new items, depending on what other accompanying materials are present along with the discs.
The advantage of listening to practice CDs is that they generally present the English language in a straightforward, clearly spoken form free from the idioms usually found in everyday speech by native speakers. Additionally, the CDs typically have speakers who talk slowly, which is more helpful for students learning English as a new language.
Some English listening practice CDs are specially designed for tests, such as the Kaplan TOEFL Listening Practice CD set available on Amazon. The Test of English as a Foreign Language is a standardized language proficiency exam taken by nonnative English speakers. Most universities, and some professional institutions, require applicants to take and pass the TOEFL standardized test before being admitted.