Yes! You can revisit scenarios and challenges as many times as you like. In fact, repeating a session can be a great way to measure your progress. The first time, you might need lots of hints. The second or third time, you'll find you can work much faster and more confidently.
You receive a completion score at the end of each session, and you have the option to restart from the beginning or resume and pick up from where you left off at any time.
We encourage you to treat scenarios and challenges like practice drills — come back to them whenever you want to refresh your skills. There's no pressure to get it right first time; the more you practise, the more comfortable you'll feel when you encounter that situation with a real client.