Possible Clues:

• Rate of progress when picking up a skill
• Quantify education going around bend in school
• Runs in, tilting on corner, picking up speed?
• Rate of progress in acquiring new skills
• Graphical look at progress
• Familiarising process
• Process of increasing understanding
• Run adding clever gain, in a way?
• On which one bends one's efforts to progress in studies?
• This educational path doesn't go straight ahead