Write as many -unk words as you can come up with.
Make a list of words in the same word family as...
Write three words in each of the -nk word famil...
Write sentences using words from the -unk family.
Cut and paste to make -unk words.
Identify and write -unk words like trunk, skunk...
Identify and write -unk words like bunk, stunk,...
Trace and write each of the -unk words.