Here are some Low Fidelity interface mockups that I worked out with my customers.
Homepage:
https://docs.google.com/drawings/d/1tg6LYJyUYLIssnsLfOdwutLYA4h6TzdILLpQzw6zZvg/edit?usp=sharing
School registration page:
https://docs.google.com/drawings/d/1Wb0rYBcflQnE3PWAfje9NLM4olF5RKpNMnLVyuLROf0/edit?usp=sharing
Score input page:
https://docs.google.com/drawings/d/1wHCn0-n6j7c_oWMY8cLRzrFBgtiTmOgG78sBD-MQOrM/edit?usp=sharing
Scoreboard:
https://docs.google.com/drawings/d/18niFj8ffIK7uX5HO6Tsx6CO9leSyZOw7_1f7SQLC6JU/edit?usp=sharing
Create event page:
https://docs.google.com/drawings/d/1kKvRze91lcwSR2WjGl-3rbw2ZbaVwCCpf5zaUFDghRI/edit?usp=sharing
