Level 4 covers additional consonant blends, including digraphs (sh, ch, wh, th, tch, -ng, -nk); r-controlled vowels (ar, or, er, ir, ur); and consonant + ie.
The complete package includes the Level 4 set of 10 Storybooks, Workbook 4, Comprehension Workbook 4, and the Teacher's Guide 4-5-6.
