Possible Clues:

• Increase, surge
• Large increase
• Rush to get uniform, given additional note, before spring
• Surge
• Abrupt increase
• Increase, upsurge
• High points before spring surge
• Sudden increase
• 'An - -baby, or an old trot with ne'er a tooth in her head' (The Taming of the Shrew)
• Movement to higher level at university - Head of School indeed!