Jetstream allocations are awarded exclusively through the eXtreme Science and Engineering Discovery Environment (XSEDE). XSEDE provides XSEDE User Portal (XUP) accounts free of charge. XSEDE allocations require that the Principal Investigator (PI) be a US-based researcher.
A guide with more detail on Jetstream allocations is available online at https://portal.xsede.org/web/guest/resources/overview.
You'll need a copy of your CV, the course syllabus, and a resource justification. The latter is basically figuring the size of the VM your students will need, the number of weeks they'll need it, and the number of students. An example of the resource selection is below.
You'll first need to create an XSEDE Portal Account if you do not already have one: