It is possible to have teachers sign off that they have read a student's IEP.   

To be able to do this, the feature must be configured and the teacher must have set up their signature.

When this feature is enabled, students with an active IEP appear on the Gradebook spreadsheet (Gradebook→Gradebook) in red highlight with a pencil icon next to the student's name.  

When the teacher clicks on the pencil icon they have an opportunity to sign the active IEP. 

Signing the IEP

Clicking the pencil icon brings up the student's Info screen (Gradebook→Gradebook→Student Info):

This screen now includes a "Student IEP" section on its right side:

From here the teacher can sign the IEP.   Simply clicking the  button signs the IEP (if the teacher has set up a signature):

Configuring the Sign IEP Option

Information on configuring this option can be found here.