Comprehension Flash Cards: fact or opinion, cause and effect, inference. This value pack of flash cards includes 3 sets of 54 cards for teaching comprehension. Covers: fact or opinion, cause and effect, and inference. Build reading and comprehension skills. Teaches fast, automatic recall. A perfect activity for independent or guided learning.Details:8.1" x 3.5" x 0.9" package size 3 sets of 54 cardsFor ages 6 and up