A flex schedule is used for drop in care or when you don't know when a child is coming in. They will only be charged for the days they are scheduled.
First, you will need to go to Settings > Classes and add in your flex/drop in rates in your class under Custom/Flex Pricing.
Next, you will need to go to the child's profile by going to the Family List > Click on their profile > Enrollments > Add Enrollment.
Select the class and the flex schedule from the drop down menu. For the price, select the default rate and you can always specify the rate in their calendar.
To schedule the child in for a day you know they will be attending, go to the calendar in the top right of their profile and click View/Edit.
Click on the day you wish to schedule the child and select the correct rate from the drop down menu. If you don't see the correct rate listed, you can choose Other. Click Schedule once you are done.
Now the day will show up in green on the calendar and they will show as scheduled in Attendance and reports for that day.
If you need to remove the day, you will need to click on the day and click Remove.