Classes are designed to be accessible to an absolute beginner, with more advanced content and technique scattered throughout, challenging even the most experienced dancers.
A beginner only needs to know where their feet are. They should also probably be able to find their arms. But that's it! Beginning classes are for people who've never done any dancing ever, or for people who are convinced that their dancing is embarrassing, or for people wanting to become more solid in their basics. These classes will get you out on the floor and feeling confident.
Beginning classes are also for people who want to perfect their dancing essentials. This is especially true of Lindy Hop. Everyone's dancing quality would be improved through re-visiting beginning Lindy Hop periodically. The best dancers in the world still work on refining their swing out, and could probably teach a whole series on the rock-step alone.
The majority of dancers should take at least a couple months' worth of Beginning Lindy Hop classes before taking the Intermediate Lindy Hop classes.
Designed for those who have just taken a few beginner series and are ready to start learning more advanced movements and technique.
Intermediate classes require previous knowledge of the given dance. If you want to take the Intermediate Lindy Hop class, you should be very comfortable doing a swing out, a lindy circle and a tuck turn. If you don't know how to lead or follow these moves, you'll probably feel lost at best and discouraged at worst in an intermediate class.
Only for the most experienced dancers, these courses focus on precise movement and technique.