r-blends: br, cr, dr, fr, gr, pr, tr,
s-blends: sc, sk, sl, sm, sn, sp, st, sw,
l-blends: bl, cl, fl, gl, pl.
3 letter blends: str, spr thr, chr, phr, shr. The consonant clusters thr, chr, phr, shr, are made up of a consonant digraph and a consonant.
Ending blends: ct, ft, ld, lp, lt, mp, nd, nk, nt, pt, rd, rk, sk, sp, st (teach these last)
Consonant clusters are the given name to two or three consonants that appear together in a word. Each consonant retains its sound when blended. The term cluster refers to the written form and the term blend refers to the spoken form.