A functional assessment would help determine what he is accomplishing with this behavior. Is he getting away from something, perhaps a task or over-stimulation? Or is he going toward something, like hoping to get a favorite toy or see a favorite truck? You can not sit back and watch where he goes if it extends beyond the school or into a high traffic area, but interviewing the family and other caregivers may grant you some insight too. You will want to chart how often it happens, what the result is (if able to) and so on. This will provide valuable info to help you create a plan of action to curb the behavior.

Maybe ask him why he is eloping. And figure out a good tool to stop it.maybe give him something to help you so he feels more attached to the classroom.

Always actively monitor the student. Analyze or ask him if there is something that triggers him enough to feel the need to leave. Maybe you can try to place a stop sign on the door so there is one more image for him to see before he takes off that remind hi that this behavior is incorrect. Verbally intervene and say something to distract his mindset of leaving. Try to shift his focus on to something whether it be a game or a "brain break" for the entire class. If he manages to leave the room, contact administration right away so they can meet him before he exits the building altogether and puts himself in a even. more dangerous position.

Offer incentives/consequences. If the student remains in class, they can get an award. If they leave, they get a consequence.

I work in a ASD classroom and at a camp for kids with special needs and we have students who try to "walk home" all the time! Oftentimes we will use something we know the student likes, sort of like a bribe or incentive to get them to want to stay. Sometimes we have kids run, and we pull anything out of the box we know they like in the moment to keep them SAFE! Once they are safely back under your supervision or inside of a room, then talk to them about how that is a bad decision, and to their best of their ability try to have them understand that is unsafe and will have consequences. Provide them solutions like "if you need a break, you may ask for a walk" or "you may pace the classroom for 5 min if you stay inside and do some work first". It all depends on the kid and their level of functioning and comprehension.

Conducting a functional assessment would be an excellent way to understand why the student is eloping. Maybe they're are eloping because they are under or over stimulated? Perhaps the content is too difficult?

locking your doors to make sure the student can not get out, or possibly moving your desk closer to the door so you can always see who enters and exits

Due to the fact that you can't have the student walking off and they must always be monitored while under your care, you have to get with the administration and start working with the parents.

This student must always be monitor.

This student must always be monitor.

The student must always be monitor