KDE runs a tool that checks cdoe for common potential errors or provides recommendations on make code cleaner.

You can find the issues for KDE's EDU applications here: EBN Krazy Issues for KDE EDU applications

The task is to fix 31 of any of those reported for "marble" and submit them as a review request for group"kdeedu" on KDE Review Board

Better skip issues in category 17 "Check for normalized SIGNAL and SLOT signatures [normalize]..", developers seem to want to fix those themselves.

Mentor: Kevin Krammer <krammer@kde.org>, IRC: krake in #kde-edu, #kde-soc