Solutions Their pupils are aged from nine to thirteen has 5 entries with similar clues

• 5-letter words
• teensThirteen-to-nineteen age group
• 7-letter words
• shudderShake from/with fear
• 8-letter words
• deadlockSituation from/in which no progress can be made
• teenagerOne who is thirteen to nineteen
• 12-letter words
• octogenarianSomeone aged between eighty and eight-nine