No you don't
So - Duolingo allows you administratively to be the "Educator" to yourself.
Which is also a great thing to strive for - to work as your own Educator as well.
Sort of like the idea of working on your business, not just in it.
You can use your prime account you use and sign up as an educator in
In Duolngo for Schools create a classroom in your target language.
Then back in Duolingo using your prime account, to join the classroom.
NOTE: However - at the moment - I do not see a great advantage to do that - as all you can assign a "student" is to do an XP challenge.
For with the latest update for Duolingo for schools I can not see how you can
Augment your curriculum by assigning specific Duolingo levels to your students,
ref : https://blog.duolingo.com/duolingo-for-schools/
Though I am hopeful in another update of Duolingo for Schools, that they may once again have this feature - to allow you to allocate a specific level to a student.
Yet, with the new structure of the courses, there is now a fantastic "Filters" option that greatly assist you in searching the Duolingo material to identify which levels you may be seeking to teach / reinforce a topic.
Once the level you want is identified in the https://schools.duolingo.com/ , if you click on the "guidebook" it will take you to the guidebook in Duolingo.com, and if you then press the
"← HOME" button, it will drop you at that task level - in your prime account. And you can then do that level.
However, if there is no "guidebook" for that level, it will not "jump" you to that level.
You have to identify the "Duolingo link address bar" for that level.
And use that.
For example on the French course, the first level that does not have a guidebook, for the course Duolingo has made available to me, is level 79.
Thankfully - it looks like the standards of addressing levels is standardized.
So, the link pattern for level 79 is :
https://www.duolingo.com/lesson/unit/79/level/1