Anki 2 has a powerful custom filtering system. If your Anki cards are tagged or have a field with the lesson number you can isolate just these cards with a Filtered Deck.
I don't know what your Anki deck looks like, but for example, if your deck has a field called "Lesson" that is numerated by number, you can put "Lesson:4" into your custom study search. When you build the deck, it will move all your cards into the Filtered deck till your done with them or empty the deck. Let me know if this doesn't make any sense.
I don't know what your Anki deck looks like, but for example, if your deck has a field called "Lesson" that is numerated by number, you can put "Lesson:4" into your custom study search. When you build the deck, it will move all your cards into the Filtered deck till your done with them or empty the deck. Let me know if this doesn't make any sense.