Xactika is a card game that challenges and builds student’s ability to estimate the outcome of a series of processes. They must evaluate the probability of being in a position to take other players’ cards that are laid down each round, based on the cards they have in their hand. There is no drawing or discarding. Xactika sharpens their math skills and critical thinking skills. They must predict exactly (hence the name Xactika) the number of rounds in which they will be able to take the cards played. The game is designed so that as play evolves, cards that appeared weak initially may become strong as the hand evolves. Developing the ability to correctly bid their hands involves analytical reasoning, following the evolution of the play develops patterning skills. Students must recognize the value of their hand, not just from having the highest point cards in one of the four suits on each card, but also from an understanding of the chances that for some of their other cards their opponents may not have cards of similar value.