３校
How to write Japanese & Stroke order

Check also 校  

Names and idioms with total stroke of 10:
重一  七宝  珍し  気孔  侫人  

Names and idioms similar to ３校:
校閲  鹿校通  生田検校  高校無償化  女子専門学校  

Check stroke order for the words below:
知寄町  焚附ける  交淡如水  譬喩的  琴桜傑将