1. In Configuration, add a new salutation with the Current grade field.
     
  2. In Mail, Forms, Statements, open an existing parameter or click New.
     
  3. Select the Format tab, under Name Formats highlight Statement Body.
     
  4. Under the Student section, select Configuration in the Select addressee/salutation from: drop-down menu.
     
  5. In the Use field: select the new salutation and click Preview. 

Or 

Implemented in version 7.78.687 when Registrar's Office is also installed, the current grade displayed in the Statement format is based upon the Student Progression Entry.  Refer to How to specify which grade level to print on statements (BB611768).