If you have accidentally deleted a student profile from a device, don't worry! As long as that profile was linked with your Kodable account it is visible on your teacher dashboard at any time. See How do I find a student code?
If you were playing with an anonymous profile, or if the profile was not linked with a Kodable account, it can only be recovered if you have the unique student code assigned to that profile.
Unfortunately, due to the large number of students using Kodable and the anonymous nature of their profiles, we cannot recover deleted or lost student profiles without their unique student code.