Tests can only be assigned to classes, and not to students individually. However, in scenarios where only a single student needs to be assigned a test, we have the following options:
Using the Give Test tool
A teacher can schedule the test with a password, and keep the password private. Using the Give Test Tool they can then allow an individual student to take the test in question.
Using a Password
A teacher can schedule the test with a password, and give the password only to the student who they want to take the test.
Using a unique Intervention Group
A teacher can make an intervention group with only the student in question, and schedule the test for that intervention group.