Class Trainer Plus is an addon for World of Warcraft Classic that upgrades the Class Trainer interface, adding the abiliy to ignore, search, and train all.
You can ignore any spell offered by your class or pet trainer by right-clicking and checking the "Ignore" option. You can then hide them from view like the other available filters. Ignoring does not work at profession trainers.
Easily find spells to ignore by using the search box. Searching also works at profession trainers.
When the Shift key is held, the Train button will allow all available, non-ignored spells to be trained at one time.