The TOEFL Junior, like the TOEFL, is of course made by ETS. And ETS has designed the TOEFL Junior to have the same basic structure as the regular TOEFL exam.
You’ll recall that there are two versions of the TOEFL: the PBT (a test administered with paper and pencil) and the iBT (a test taken on a computer). The PBT has three sections: Listening, Reading, and a section that focuses on grammar, called “Structure and Written Expression.” The iBT, which is a much more commonly-taken exam, has four sections: Reading, Listening, Speaking and Writing. And of course, the iBT is taken on a computer.
There are two versions of the TOEFL Junior that also have the two structures described above. The TOEFL Junior Standard exam is like the PBT. It is administered as a pencil-and-paper exam, and has sections that test listening, reading, and grammar. The TOEFL Junior Comprehensive exam is like the iBT— it’s administered by computer, and it tests skills in reading, listening, speaking, and writing.