A CLKC file is a set file created by Clicker Connect, an iPad app used to help students build sentences. The file contains a set of sentence starting words and end phrases for students to link together.

You can create CLKC sets that pertain to certain subjects such as 2D shapes, weather writing, contractions, and musical instruments. You can also add images to your CLKC sets that help students match sentences with assigned pictures. The images can be added from the app's library or your iPad. The Connect app is used to teach students to compose coherent text by connecting words and phrases to build sentences. Clicker Connect is part of the Crick Software family. Other apps for iPad include Clicker Sentences, Clicker Books, and Clicker Docs.