The game I played was with a total of 4 players. 3 players start the game with 8 cards and the dealer has no cards to start. The dealer has to pick up the discarded cards to enter the game and the dealer cannot start to play until they have 8 cards. The 4th player enters by "picking up the trash".
The card game has 1 - 7, then 10, 11, and 12. The 10-12 are similar to Jacks, Kings, and Queens. The object of the game is to discard all your cards by matching 3-4 of the same numbers or a run (3+ cards of the same suite). The game starts by each player giving one card to the person to their right. Then the player to the right of the dealer pulls a card from the deck and tries to use it. If they cannot use it, then the player next to them is offered the same opportunity. If no one uses it, then the person to the right turns over another card and attempts to use that card. What's interesting is that the 4th player's cards are seen by all, but still often the 4th player wins.
I'm not sure how this game could be used in education. It's a game that would be fun to teach in a Spanish course as a piece of culture and as a means of practicing Spanish, but I don't see it as teaching Spanish. It is interesting to note that teaching someone a card game in another language, even if they speak the other language for many years, still causes the person a little extra work to strategize.