To change the Lesson's group or class click on the groups name (Kittens).
In the Change Lesson popup select the group you wish to change the Lesson to, and their Level. (Chickens, Magenta). Click Save.
To change the Level click on the Level in the Lesson header (Magenta).
In the Select Lesson Level popup, select the Level Type (NZC - Colour Wheel) and Level (Red) you wish to change to. Click Save.