Option for check all with half ages

What specific challenge or problem does this idea solve?

When sending out class information, I would love to be able to send it to ages 1-2.5 for example. Right now, you can check all ages 1-2. I wondered if the system could check all with a half age also?

How should this work?

Who will benefit (Admins, Staff, Students)?

How will this change impact your daily tasks or overall experience?