How to assign test to students?

Teacher can assign a test to the students from his school.

Parent can assign tests to his children.

Student can assign tests to his friends(other students that confirmed that they trust him)

Teacher can assing tests that he has created. These can be found in section My materials. However he can also add school tests that were created and approved by other teachers. These are in section School tests:

In both section you can find a button Assign:

Then select a class:

or in the class select individual student or select whole class:

After assigning the test it is added in the section "Assigned by me". Here you can find the results from the students to which this test was assigned:
How can I see the results of the test I have assigned?