Take It to Your Seat Phonics Centers, Level D is an instructional must-have in 2-3 classrooms. The 14 full-color centers stored in envelopes provide engaging, independent practice of the phonics skills presented.Center topics include: sounds of oo sounds of c, g, and s sounds of ch voiced/unvoiced th dipthongs: oi, oy, ou, ow silent letters: b, h, k, n, w, g, c, l, t 1-,2-,3-,4-syllable words vowel digraphs -long a: ai, ay, eigh -long e: e, ea, ey -long i: ie, uy -long o: oa, ow, oe -long u: ew, ue rhyming words word families: -ead, -ew, -ain, -air word families: -udge, -ight, -ound, -ore plurals inflectional endings prefixes: dis-, re-, un- suffixes: -ful, -less, -ly