How do I send words to trainings for review?

There are two ways:

1) If you have your own set of words you need, just select it in trainings by clicking on the menu: 

Then the trainings will only use the words from the selected set. «Review» and «Leo-sprint» are the only exceptions.

2) Select the words you need in the dictionary and click «Learn words» - the selected words will be sent to all available trainings: 

Or you can select the words and send them to specific trainings: 

In this case, the selected words will be added to the ones already in these trainings.