All skill grades for TK and K should be I, P, or NT. You can enter them directly as overrides on “Grades > Report Cards”, or you can grade assignments with an I/P/NT grade scale (“Setup > Grading”).

The overall grade for TK and K (any subjects) can be anything (letter or number), but no overall grade is reported to Data Rollup.

In Kindergarten, the only grades should be appearing from the Skill Set grading area. Your *NAD.K.HR-K teacher will want to go into the Report Card Screen (Report Card Class in RenWeb1, or Gradebook> Report Card in Desktop) and remove the grades entered here. 

Here’s the link to the K report card: