I think it is too laborious to do that with every blend pattern in English.
Just uncover one sound of a word at a time and teach the child HOW to blend. That is a skill that will reap a reward over and over again.
My kids have poor phonemic processing skills, and making the jump from blending CVC words to blending CCVC words was non-trivial. Just as it took a *lot* of work for them to be able to apply their phonics knowledge to blending CVC words (we worked through individual word families one by one, learning to blend each and every combination on its own, before going back and doing mixed practice), it was a lot of work for them to extend their CVC blending skill to CCVC words.
We worked through one blend at a time, learning how to blend /s/ /p/ to get /sp/ and how to blend /s/ /t/ to get /st/ and so on and so forth. And after they could reliably blend each blend when taught in "blend families" (it did go faster about halfway through, as they got practiced at blending blends), we did a *lot* of mixed practice - that was tricky at first, but got easier with practice. It has paid off, though, because the move to ending blends (CVCC) was pretty easy, and the move to CCVCC words was trivial.
We probably did just as much work learning to blend all the possible combinations as it would take to memorize the sound of each combination. I think we worked through about 460 words with two or three letter blends going through that section, spelling and reading 20 a day (with lots of repetition working through the beginning blends). But those 460 CCVC/CVCC/etc words were done in half the time it took to work through the 280-odd CVC words - I spent a solid year on learning to blend CVC words with each girl, and just six months on blends. And Dd7 hit the "shr-" blend today and nailed it without any trouble - all the work is paying off .
(In terms of number of blends, our program works through 28 beginning blends, organized by S-blends (eight), R-blends (seven), L-Blends (five), three-letter S-blends (just two, although there's six in English), digraph blends (five, but they are done after the "main" blends section) and one outlier (tw-); our program works through 18 ending blends, organized by N-blends (two), S-blends (three), L-blends (nine), and four miscellaneous blends. At least for me, that organization made the number of blends seem less overwhelming and less random. And I have all that info at my fingertips because I made a blends chart for the kids to refer to when doing spelling - blends are enough of a bugaboo for my oldest (she can't hear them well and will slap down who-knows-what when trying to spell them, although the remedial blending work I'm having her do as part of practicing cursive is helping) that I kind of *do* want her to memorize each one, just like memorizing phonograms.)
Edited by forty-two, 01 April 2016 - 11:57 AM.