Think It Through Learning Tiles Spelling Set How To Freeze Multiple Rows In Excel. For use with the #3090 THINK IT THROUGH Learning Tiles Case (sold separately). Improve early spelling skills with 50 progressive self checking Spelling Activities. Follows synthetic phonics progression. Includes two sets of 25 activity cards. Set 1 with Sid the Shark 3 Levels. Skills: Spelling patterns, Letter blends, Tricky words. Level 1 (Cards 1 8): Covers letters s, a, t, p, I, n, m, d, g, o, c, k, ck, e, u, r, h, b, f, ff, l, ll, ss. Level 2 (Cards 9 16): Covers letters j, v, w, x, y, z, zz, qu, ch, sh, th, ng, ai, ee, igh, oa, oi, oo, ow, ar, air, ear, er, ur, or, ure. Level 3 (Cards 17 25): Covers letters st, nd, mp, nt, nk, ft, sk, lt, lp, tr, dr, gr, cr, br, fr, bl, fl, gl, pl, cl, sl, sp, st, tw, sm, nch, scr, shr, str, thr. Set 2 with Tab the Turtle 2 Levels. Skills: Spelling patterns, Silent letters, Alternative sound spellings, Prefixes and suffixes. Level 1 (Cards 1 21): Covers letters ay, ou, ie, ea, oy, ir, ue, aw, wh, ph, ew, oe, au, a_e, e_e, i_e, o_e, u_e, ge. Level 2 (Cards 22 25): Covers words with prefixes, suffixes, silent letters, and that follow certain spelling rules and patterns.