In order for the notes to be visible in the "Gradebook" for students, the semester must be added in the "Gradebook" module.
Access Kinderpedia from a laptop / computer using the WEB browser (Chrom, Mozilla, Safari, etc.).
Click on the "Kinderpedia Modules" displayed under the name at the top right and scroll down until you find the "Gradebook" module, when you find it click on "Settings" (that little button to the left of the red "Disable" button).
Click on "Add a new school interval".
Enter the school year, semester name and interval. To add another semester click on "Add", to save the changes, click on "Save".