In the TOEFL exam you will often hear conversations between two students about something related to campus life. In the iBT version of TOEFL, these conversations not only appear in the listening section but also as a part of the integrated questions of the Speaking Section.
Since these conversations are in a more informal style (compared to the more correct style in academic lectures), you need to know a lot of vocabulary that is more relaxed and natural, as would appear in real life. Notice how some of the expressions are idiomatic.
ETS also offers the TOEFL Junior tests, a general assessment of middle school-level English-language proficiency. It is intended for students aged 11+.The tests are administered in two formats: TOEFL Junior Standard (on paper) and TOEFL Junior Comprehensive (via computer). The TOEFL Junior Standard test has three sections: Reading Comprehension, Listening Comprehension and Language Form and Meaning. The TOEFL Junior Comprehensive test has four: Reading Comprehension, Listening Comprehension, Speaking and Writing. TOEFL Junior scores are mapped to the CEFR and test takers are provided with a certificate of achievement.