When you flex, you are moved to another cohort so you can repeat the unit you need to master.
Flexing does extend your time at Lambda by a unit or longer depending on how many units you need to flex. About 15% of students that have graduated from Lambda flexed at least once.
At this time we're able to offer one flex opportunity per unit. If you're not able to master the expected skills on the second attempt of a unit, you become a candidate for withdrawal, so it's important you really focus on the skills you need to develop on the second attempt.