Watch a first grader read the word ship for the first time after a few months of short vowel practice. Many will say "s-h-i-p," four tidy sounds, and then look up puzzled because "suhhip" is not a word they know. That moment is the reason digraphs need explicit teaching. Until now, children have learned that one letter makes one sound. Digraphs break that pattern, and the FLOSS rule and the -ck spelling add a second surprise: sometimes we write two letters where we only hear one sound, simply because English spelling has conventions.
This guide walks through how to teach these patterns in kindergarten, 1st grade and 2nd grade review using a structured literacy approach. You will find a recommended order, a short daily routine, the most common errors and what to do about them, ideas for differentiation, a 12-week sequence and simple ways families can help at home.
What Students Are Actually Learning
It helps to be precise about the concepts, because children learn what we name clearly.
Digraphs: two letters, one sound
A consonant digraph is two letters that together spell a single sound. In shop, the s and h do not each make their own sound; together they spell /sh/. The common consonant digraphs young readers meet first are sh, ch, th, wh, ph and ck, along with ng, which spells one sound at the end of words like sing.
The idea that letters can team up is genuinely new. Children need to hear it, see it and practice it many times before it becomes automatic.
Th has two sounds
Th spells two slightly different sounds. In thin and thumb, the sound is unvoiced: air flows, but your voice box stays quiet. In this and that, the sound is voiced: put a hand on your throat and you feel a buzz. Most children can read both without much trouble, but separating them helps with spelling awareness and with careful pronunciation, especially for English learners.
The FLOSS rule
The FLOSS rule is a spelling convention: in a one-syllable word with a short vowel, a final f, l, s or z is usually doubled. Think puff, bell, miss, buzz. The name comes from the word floss, which follows its own rule. Families of words like ball, doll and dull (-all, -oll, -ull) fit here too, and they are worth teaching as a group because the vowel sound in -all does not behave like a typical short a.
Ending -ck
After a short vowel at the end of a one-syllable word, the /k/ sound is usually spelled ck: duck, sick, rock. Children who learn this early stop writing "duk" and "sik."
Ending -ng and -nk
These are often called glued or welded sounds. In ring, sang and long, the ng spells one nasal sound, and the vowel before it sounds a little different than in a plain CVC word. In pink and bank, the n before k takes on that same nasal sound. Teaching -ang, -ing, -ong, -ung and -ank, -ink, -onk, -unk as chunks often works best.
Why the Order Matters
Structured literacy is systematic and cumulative, which means skills are taught in a planned sequence and each new skill builds on what came before. For this group of patterns, a sensible order looks like this:
- FLOSS rule (ff, ll, ss, zz)
- -all, -oll, -ull
- Ending -ck
- Digraph sh
- Th (unvoiced)
- Th (voiced)
- Ch
- Review of the digraphs so far
- Wh and ph
- Ending -ng
- Ending -nk
- Final review of everything
The FLOSS rule and -ck come first because they are about doubling and spelling, not new sounds, so they extend short vowel CVC work gently. Sh and ch are high-frequency and easy to hear. Wh and ph are less common, so they wait until the core digraphs are secure. Ng and nk come last because the vowel shift makes them trickier.
This is exactly the sequence used in the Digraphs & FLOSS Rule Word Work, which organizes 60 worksheets into 12 sequential skills with two built-in review points.
The Core Teaching Moves
Whatever pattern you are teaching, the same handful of moves does most of the work.
1. Hear it first
Start with sound, not print. Say three words and have students show a thumbs-up when they hear /sh/: ship, sat, wish. Ask whether the sound comes at the beginning or end. Phonemic awareness is the foundation for everything that follows.
2. Connect the sound to the spelling
Show the digraph on a card or a sound chart with a key word and picture. "This is s-h. Together they say /sh/, like at the start of ship." A sound chart that stays on the wall all year gives students a reference they can glance at when they are stuck. The product includes a Digraph Sound Chart with 16 spelling patterns and key words for this purpose.
3. Tap and map
Phoneme-grapheme mapping means connecting each sound in a word to the letters that spell it. Students tap or say each sound, then write the spelling for each sound in its own box. For ship, there are three sounds and three boxes: sh, i, p. The digraph shares one box. For bell, there are three sounds: b, e, ll. The double letter shares one box.
This one visual does an enormous amount of teaching. It shows students that the number of letters and the number of sounds are not always the same, which is the core idea behind every pattern in this unit. Mapping also supports orthographic mapping, the process by which words become stored in memory for instant recognition.
4. Read it in words, then sentences
Once students can map a word, they need to read many words with the pattern, then read it in connected text. Sentence reading is where the skill starts to feel like real reading. Simple yes-or-no sentences ("A fish can swim. Yes or no?") make students read every word to decide.
5. Spell it from dictation
Dictation closes the loop. You say a word or short sentence, students repeat it, tap the sounds and write it. Dictation reveals what students truly know, because they cannot copy or guess from a picture.
A daily two-minute warm-up
Before each lesson, a very short review keeps earlier patterns fresh. Flash four or five sound cards, say a few words for students to tap, and dictate one word from a previous skill. Two minutes is enough. The teacher guide in the resource is built around a daily routine of this length.
Five Worksheet Types That Do Different Jobs
A good word work set gives practice that looks a little different each day but stays predictable. In the Digraphs & FLOSS Rule Word Work, every skill uses the same five worksheet types, and each does a distinct job:
- Tap & Map builds phoneme-grapheme mapping.
- Fill the Sound asks students to complete words with the right spelling, focusing their attention on the target pattern.
- Look-Alike Words makes students discriminate between words that differ by one spelling, which builds careful reading.
- Yes or No? moves the pattern into sentence reading for meaning.
- Real or Silly? has students decide whether a word is a real word or a nonsense word, paired with dictation practice.
Keeping the same structure across all twelve skills means children learn the directions once. After the first week, they can spend their energy on the new spelling pattern rather than on figuring out what the page wants.
Common Mistakes and How to Fix Them
Sounding out each letter in a digraph
The child reads chop as "c-h-o-p." Go back to mapping. Put up three boxes and ask how many sounds they hear. Then show that c and h share one box. Have them underline or loop digraphs before reading the word. Over time, fade the underlining.
Confusing sh and ch
These sounds are close. Teach the mouth difference: /sh/ is a long, quiet stream of air, like asking for quiet in a library. /ch/ is a quick burst, like a sneeze. Have students hold a hand in front of their mouth and notice the difference. Sorting picture cards into sh and ch piles is great practice.
Forgetting to double in FLOSS words
The child writes "bel" or "mis." Ask three questions: Is it one syllable? Is the vowel short? Does it end in f, l, s or z? If all three answers are yes, double it. Post the questions on a small card at the table.
Writing k or c instead of ck
The child writes "duk" or "bac." Remind them that ck comes right after a short vowel at the end of a one-syllable word. Have them tap the word, find the short vowel and check the very next sound.
Dropping the n in -nk words
The child writes "pik" for pink. The nasal sound is subtle and easy to miss. Have students say the word slowly while touching their nose to feel the vibration. Practice -ank, -ink, -onk and -unk as chunks rather than separate sounds.
Mixing up wh and w
For most speakers, wh and w sound the same, so this is a spelling issue rather than a reading issue. Teach a small set of common wh words together, like when, what, which, whip, whale, and let students know these just need to be remembered.
Reading look-alike words carelessly
A child who reads shop as ship is often guessing from the first sound. Look-alike practice helps, but so does a simple habit: point under each sound and read through to the end. Praise accuracy over speed.
Differentiation
For students who need more support
- Slow the pace. It is fine to spend two weeks on a skill if mapping is not yet secure.
- Use physical tools: sound boxes on the table, letter tiles, or tokens to push for each sound before writing.
- Reduce the number of items. Five well-practiced words beat fifteen rushed ones.
- Keep a personal sound chart in the student's folder.
- Work in a small group where you can hear each child tap and read.
For students in special education or intervention
Many students who receive intervention benefit from more repetition, more explicit modeling and more cumulative review. Keep the routine identical every day, and revisit earlier skills often. Short, frequent sessions tend to work better than long ones. Dictation is especially useful here because it shows you precisely which sound-spelling links are missing.
For English language learners
Some sounds, especially both versions of th, may not exist in a student's home language. Model mouth position slowly and use mirrors. Keep vocabulary picture-supported, and check that students know the meaning of words in yes-or-no sentences, because a decoding exercise can turn into a vocabulary exercise if the words are unfamiliar.
For students ready for a challenge
- Move to two-syllable words with the same patterns, such as chicken, thinking or rocket.
- Have them write their own Real or Silly? lists for a partner.
- Ask them to sort words by pattern and explain the rule they used.
- Dictate full sentences instead of single words.
A 12-Week Word Work Plan
The following sample plan gives each skill one week. Adjust freely: some groups will need longer on sh and th, and some will move through FLOSS quickly.
- Week 1: FLOSS rule (ff, ll, ss, zz). Introduce the three questions. Map words like puff, hill, mess, fizz.
- Week 2: -all, -oll, -ull. Teach as chunks. Practice word families and sentence reading.
- Week 3: Ending -ck. Contrast with words that end in k after a consonant only if students are ready; otherwise stay focused on short vowel plus ck.
- Week 4: Sh. Introduce the digraph concept fully, with mapping in a shared box.
- Week 5: Th (unvoiced). Hand-on-throat check. Words like thin, bath, math.
- Week 6: Th (voiced). Contrast with week 5. Words like this, them, that.
- Week 7: Ch. Contrast with sh using sorting and mouth cues.
- Week 8: Digraph review. Mixed practice with sh, th and ch. Use dictation to check who is secure.
- Week 9: Wh and ph. Smaller word sets, extra focus on spelling memory.
- Week 10: Ending -ng. Teach -ang, -ing, -ong, -ung as chunks.
- Week 11: Ending -nk. Teach -ank, -ink, -onk, -unk as chunks.
- Week 12: Final review. Mixed practice across all patterns and a celebration of progress.
Within each week, a simple rhythm works well: introduce and map on day one, fill the sound on day two, look-alike words on day three, sentence reading on day four, and real-or-silly plus dictation on day five. That rhythm matches the five worksheets per skill in the product, which also comes with its own 12-week word work plan, dictation word lists, answer keys and Tap & Map grapheme split answers.
Classroom Management Tips
- Teach the routine before the content. Spend the first day of the unit practicing how to tap, how to fill boxes and how to check work. After that, students can move quickly.
- Keep materials in one place. A word work folder with the sound chart, current worksheet and a pencil saves several minutes a day.
- Use the same signals. A consistent cue for "tap it out" and "read the whole word" reduces talking and keeps the pace brisk.
- Check a few items, not every item. Glance at the mapping boxes and one dictation word. That tells you most of what you need to know.
- Celebrate accuracy. A small award at the end of the unit, like the Digraph Detective Award included in the set, gives children a finish line.
Helping Families at Home
Families do not need special materials to support this work.
- Go on a digraph hunt. Look for sh, ch and th on food labels, signs and book covers.
- Play "How many sounds?" Say a word like fish and have your child count the sounds on their fingers. Three sounds, even though it has four letters.
- Practice a little dictation. Say three words with the week's pattern and have your child write them. Then check together.
- Read decodable books. Ask your child's teacher which patterns have been taught so books match their skills.
A short note home at the start of each skill, naming the pattern and listing a few practice words, makes it much easier for families to help.
Frequently Asked Questions
When should digraphs be taught?
Most programs introduce digraphs once students are reading short vowel CVC words with some confidence, which is often partway through kindergarten or early in 1st grade. Second graders who are still unsure benefit from a structured review.
Should I teach the FLOSS rule before digraphs?
Teaching FLOSS and -ck first works well, because those patterns keep students in familiar short vowel words while introducing the idea that spelling sometimes uses extra letters. That idea prepares them for digraphs, where two letters spell one sound.
What is the difference between a digraph and a blend?
In a blend, like st or bl, you still hear each sound. In a digraph, like sh or ch, the two letters spell one new sound. Mapping makes the difference clear: blends take two boxes, digraphs take one.
How long should daily word work take?
Ten to fifteen minutes is usually plenty: a two-minute warm-up, a short explicit lesson and one focused practice page. Consistency across the week matters more than a long session.
Why use nonsense words?
Nonsense words check whether a student is truly decoding rather than recognizing memorized words. Pairing a real-or-silly decision with dictation keeps the practice meaningful while still revealing whether the student knows the pattern.
Is this approach appropriate for intervention?
Yes. The structured, cumulative sequence and predictable routine suit RTI groups, tutoring and special education settings, where students benefit from explicit teaching and frequent review.
Wrapping Up
Digraphs and spelling conventions like FLOSS and -ck mark a real turning point in early reading. Children move from simple one-letter, one-sound decoding to a more flexible understanding of how English spelling works. Teach the patterns in a clear order, keep a short daily routine, map every word, and let dictation tell you what each child knows. With twelve steady weeks of practice, most students will leave this stage reading and spelling words like shell, thick, which and drink with confidence.
