Sound Robots

Overview

Students learn to decode and encode short-vowel CVC words (with optional consonant digraph extension) using a clear phonics pattern. They use micro:bits in a low-risk “show a phoneme/word → check → encode” routine to practise reading and spelling in pairs.

Learning intentions

• Students will read short-vowel CVC words by blending sounds.
• Students will spell CVC words by segmenting and writing the correct letters.
• Students will use a consonant digraph extension (e.g. ch, sh, th) for words that include it.
• Students will use micro:bits to quickly check a spoken or written word/sound match.

Success criteria

• I can blend the sounds to read a CVC word (e.g. c-a-t → cat).
• I can segment sounds in a word and write the letters to spell it.
• I can choose the correct letter(s) for a target sound (single vowel for CVC; digraph if used).
• I can check my answer using the micro:bit display routine and self-correct.

Curriculum links

• EN1-PHOKW-01: use initial and extended phonics to decode and encode words, including vowel digraphs/trigraphs (today: short vowels; optional move into digraph consonants).
• EN1-SPELL-01: apply phonological and orthographic strategies when spelling in a writing context (segmenting/blending + letter choice).
• EN1-RECOM-01 (light touch): activate word knowledge while reading short words and confirming meaning through accuracy.

Lesson structure (45 minutes)

1. 0–5 min · Hook (phoneme mystery). Teacher shows the introduction slides and displays 3 pictures (cat, pig, bed) one at a time, asking: “What sounds do you hear in this word?” Students call out the first sound and then the whole blended word.

2. 5–12 min · Explicit teaching (CVC routine). Teacher teaches a class phonics routine: “Say it → stretch it → letters” for spelling, and “Look → say sounds → blend → read” for reading. Teacher models two words on the board:

• cat: /k/ /a/ /t/ → letters c-a-t
• pig: /p/ /i/ /g/ → letters p-i-g Teacher then briefly shows optional digraph extension: “If a word has ch/sh/th, we write two letters for one sound.”

3. 12–18 min · micro:bit quick introduction + safety. Teacher introduces micro:bits as “tiny number-and-letter screens.” Using the introduction slides, teacher demonstrates:

• how to hold the device safely (screen facing you, hands on sides)
• not to touch the connector pins
• keep water away and cables only move by the teacher if needed
• devices stay on the table unless instructed Teacher explains we will not do advanced coding; the micro:bits already have a simple “check mode” set by the teacher.

4. 18–25 min · Unplugged to plugged (same task, two stages). Unplugged: Teacher holds up a phoneme card set (e.g. c – a – t). Students in pairs “build” the word with letter cards on a mini whiteboard. Plugged: Teacher switches to micro:bits. Each pair chooses one word card, says the word, and uses the micro:bit check routine to confirm the target (teacher monitors correct/incorrect outcomes for immediate feedback). Roles: Partner A reads/blends; Partner B segments/spells, then they swap.

5. 25–38 min · Main practice (paired decode + encode with differentiation). Teacher distributes the CVC and digraph spelling practice worksheet. Pairs complete two rounds of the same structure:

• Round 1 (core): decode then encode CVC words (3–5 words per pair)
• Round 2 (extension for confident learners): a few digraph CVC words (e.g. chip, shop, that—teacher chooses 1–2 matching the class level) Micro:bit use: For each target word, the pair places the micro:bit next to the board work and runs the “check mode” display (see below). Students correct their spelling if the check does not match.

Simple micro:bit program concept (teacher-installed, no student coding):

• Press button A to show the target phoneme/word pattern (e.g. “CVC” icons or a pre-set word display such as “cat”).
• Press button B to show “match/not match” pattern based on the teacher-provided response routine (teacher-designed). If your micro:bits cannot do automatic checking from handwriting, teacher can still use them as a “display prompt”: the micro:bit shows the correct word; students compare with what they wrote.

Differentiation

• Core support: teacher provides a word frame ( _ a _ for CVC, then students fill in letters) and a “stretch sounds” cue card.
• Core: students practise 3 CVC words + 1 digraph word.
• Extension: students generate 1 extra word by changing one letter (e.g. cat → cap, or chip → ship if appropriate) and spell it for checking.
• EAL/SEN: allow oral rehearsal before writing; provide sentence stems for partner talk: “I hear… so I write…”.

6. 38–43 min · Formative assessment check (teacher quick confer). Teacher uses the introduction slides to show the “Success checklist” and does a 1-minute scan of pair work:

• Can students read/blend CVC accurately?
• Do they spell with correct letter order? Teacher marks 0–1-2 on a class tracking sheet: 1 = needs support, 2 = accurate and self-corrects.

7. 43–45 min · Exit check. Students complete a quick exit item on the CVC and digraph spelling practice worksheet (or last box):

• “Write the word for the sounds: /b/ /e/ /d/” and “Underline the digraph letters in: chip (if included in your set).” Teacher collects and reviews for next-lesson groupings.

Resources

• the introduction slides (hook visuals, teaching slides, micro:bit safety + routine, checklist)
• the CVC and digraph spelling practice worksheet (decode/encode + exit box)
• Class set of letter cards (a small set for c/a/t, p/i/g, b/e/d plus digraph letter pairs if used)
• Word cards with target images and words (cat, pig, bed + digraph set)
• Micro:bits (1 per pair or 1 shared per group), batteries or connected power, micro USB leads
• Teacher device for loading the simple micro:bit program
• Mini whiteboards and markers/erasers (or paper + pencils)
• Accessibility: larger phoneme cue cards; coloured “vowel” highlight (e.g. vowels in yellow)
• No-micro:bit backup: letter magnet/clothespin word builder tray + picture-only word matching cards

Assessment

• Observation during pair work: blending and spelling accuracy; note common errors (sound order, missing vowel).
• Micro:bit prompt comparison: does the student’s written word match the displayed target?
• Exit check: one CVC spelling item and one quick digraph identification (if included).

Differentiation

• Support: teacher-led “sound stretch” first; word frames; more repetition on 3 key CVC words.
• Core: standard CVC list with 1–2 digraph extension words.
• Extension: letter-change challenge + independent spelling for an extra word.
• Inclusive adjustments: allow oral response first; provide visual vowel colour cue; seating close to teacher for first device setup.
• EAL: keep vocabulary consistent with the chosen word set; pre-teach picture meaning briefly using partner talk.

Troubleshooting (first-time teacher)

• If micro:bits won’t display the target word: switch to “display prompt only” mode (micro:bit shows the correct word; students compare what they wrote).
• If devices connect slowly: pre-load the program during setup time; keep one USB per device staged and label cables.
• If button presses confuse students: use one agreed action (“Button A shows the target word; we compare”) and practise with 1 example before starting the worksheet.
• If pair noise increases: assign roles and rotate pairs only after the micro:bit check step is completed.

No-micro:bit backup activity (instant switch)

• Students use the same word cards and letter cards to build and check words: micro:bit display replaced by teacher holding up an answer card at timed intervals (“Show, Check, Fix”). Students then record final spelling on the CVC and digraph spelling practice worksheet.