Possible Clues:

• Raise to higher class (air travel)
• New software giving improved exam performance
• Promote leading brand?
• Argued furiously about Pentium's first improvement
• Might 'e drag this for improvement?
• Raise to higher rank or improve
• You get ten on in it - and a further amount around where it is.
• Improve and get a higher mark
• Improve what was old or outdated
• I'm inclined to move to a better room