Step-by-step explanation:
Placement tests: These tests are used to assess the language proficiency of students before they begin a language course. Placement tests help to determine the appropriate level of study for each student.
Diagnostic tests: These tests are used to identify specific areas of weakness in a student's language skills. Diagnostic tests help teachers to design effective lesson plans that address the specific needs of each student.
Progress tests: These tests are used to measure a student's progress over the course of a language program. Progress tests can help teachers to identify areas where students are struggling and adjust their teaching methods accordingly.