When we learn about digraphs, I usually make an anchor chart for each digraph.  As a class, we discuss words that have that specific digraph in them.  I write the words on the chart, but then students are allowed to add words to our charts as they find them around the room, or in books.   In the past, I usually would just make the charts by hand, but this year I decided to whip some up on the computer so they were a little bit nicer.  If you would like a set of these FREE digraph anchor charts, you can get them on Teachers Pay Teachers, here.

Diagraph Anchor Charts, Freebie