Lead was ripped from a school roof in Maidenhead while teachers held a parents' evening beneath.
The thieves are believed to have struck at St Luke's School sometime between 8-8.30pm on Tuesday last week.
The Cookham Road primary has ordered artificial lead to repair the damage.
A pile of lead was later found dumped over a nearby fence.
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The victim of an assault in Cippenham was flown to hospital by air ambulance this afternoon.
A rapid response vehicle, an ambulance officer, an air ambulance and an ambulance crew were all called to an address in Earls Lane at 2.10pm.