I use the i-nigma app on my IPhones. However any scan app on any device will work.
This is aligned to the Scott Foresman Reading Street Common Core first grade curriculum. It has different activities for the students to do. There are activities for reading, writing, spelling words, high frequency words, grammar, phonics and parts of speech. Each card is labeled for the unit and week it is (i.e. 1.4 is unit 1 week 4). The cards are also numbered and labeled to help the students keep track of ones they already finished.
Hang the cards around the room for each week. The students will use the device you have to scan the codes. They will follow the directions that pop up and complete the tasks.