Can I send different parts of the placement test? Can I reassign just one part of the test?

The placement test consists of one compulsory grammar section and optional listening, reading, writing, and speaking sections.  When you assign the test you can choose which other parts to send along with the grammar section.  Keep in mind that it’s not possible to have your student re-attempt any individual part of the test; you’d have to reassign the whole thing.  You can see a video demonstration here.