Intelligibility is the art of being understood by others. Many students think they need to speak flawlessly and with a native-like accent to make themselves clear, but this is not quite true. While there is a correlation between proficiency and intelligibility, even students of lower general proficiency are capable of expressing what they mean, in a way that the listener understands. 

This is often extremely important in work environments, especially today when 78 percent of companies report the need for English-speaking employees.

Intelligibility is a vital aspect of communication but it is not exactly a skill in itself. Instead, it is a combination of fluency, pronunciation, and managing your speed of speech. To reflect how important this is for language learners when studying, traveling or at work, we’ve introduced an Intelligibility Index as part of the scoring of our Versant English Test.

This index is based on factors affecting how understandable speech is to native speakers of English. These include things like speed, clarity, pronunciation and fluency. Ranging from 1 (low) to 5 (high), it shows how intelligible someone’s speech in English is likely to be.

Let’s go into some activities and exercises you can try in class to help your students improve their intelligibility. 

How can we help our students improve their intelligibility?

As you’ve now seen, there are a number of factors that influence a student’s intelligibility. Here are some ways to start building them into your lessons plans.

1. Record their speech 

If your students have an issue with intelligibility, recording them in class can make a big difference. You can do this using a smartphone or laptop computer.

There are plenty of ways to encourage them to speak. Have them answer an open question, ask them talk for a minute on a topic that they are passionate about or simply get them to tell each other what they did at the weekend.

Listen to the recordings and analyze their speech:

  • Are they speaking at a good pace?
  • Could they speak with more clarity?
  • Could anything be misunderstood? 
  • Are there any particular words or sounds they struggle with or do they repeat themselves a lot? 
  • What pronunciation issues do you notice?

Give individual students feedback and work with the class as a whole on common issues. 

2. Listening and shadowing

Listening is a very important part of intelligibility. After all, students have to be able to hear a word before they can actually say it. Listening also takes focus away from how words are written on the page. This is key because English speakers blend words together, so pronouncing each word perfectly in isolation is not a good goal to have – this kind of practice just reinforces pronunciation habits that take us further away from good intelligibility.

That’s where shadowing comes in. 

Shadowing is a useful listen-and-repeat activity that students can practice almost anywhere.

First select some audio for your students. It should be under five minutes in length and only be based on the speech of a single proficient English speaker. could be a good place to start for more advanced students.

Have students listen to the audio to get used to how the speaker sounds. They should pay attention to the rhythm, accent and intonation. Students should be able to understand most of what is being said. 

Shadowing involves repeating what the speaker says at the same speed as the speaker (or as fast as possible), for about 30 seconds. Students can pause, try again, and even record and listen back to their own versions. 

This will help your students focus on how English speakers modulate speed, intonate and blend words together. By repeating back what they hear, they begin to improve their own intonation, connected speech and overall fluency.

Read more about shadowing.

3. Target the problem sounds

This simple but fun activity will help your students focus on their individual problem sounds. It will also get them to listen to each other carefully. 


Throughout the lesson, as you listen to your students speak, identify a number of words that reflect the pronunciation challenges your students face. Write the words on the board and group the words by phoneme, for example:

  • /i:Heat, Sheep
  • /ɪ/ Hit, Trip

Above we can see there is an issue with the /i:/ and /ɪ/ sounds (the long and short “i”). Once you have enough words to work on, write a list of numbers on the board. Explain that each number has a corresponding word. 

1 – Hit                        4 – Hat                      7 – Head 

2 – Heat                     5 – Heart                   8 – Hood

3 – Hot                       6 – Hurt                     9 – Hid

As you can see in the above example, the words only differ by one phoneme (heat/hit, hot/hat, heart/hurt, etc.). This will make the exercise more challenging and useful for the students.

Next, identify the vowel sound in each word and write their phonemic symbols on the board. Drill the sounds and then the words until you are confident your students can repeat them successfully. There are a number of phonemic charts online, that can help you identify the phonemes and model the sounds for your students. English Club has an easy-to-use interface, for example. Alternatively, you can download free interactive phonemic charts to your smartphone – these are available for both Android devices and iPhones.

Then test the class by calling out a number and having them shout out the corresponding word. Then call out a word and get them to tell you the number. Deal with any problems that arise.

Put students into pairs. Have them read out their phone number only using the words in the list (note they can use a real number or invent one). Their partner should listen and write down the number which corresponds with each word they hear. They should then swap roles and do the same again. 

Finally, get students to check and see whether the number their partner wrote down is correct. Monitor and go back and drill any of the sounds which students had most problems with.

4. Transcribe and drill new vocabulary

While problems with individual sounds may occasionally impede understanding, we should also focus on other aspects of pronunciation such as word stress, sentence stress and intonation.

Keep a note of any new vocabulary that comes up during your class. At the end of the lesson, take five minutes to review it with the students. Write each new word on the board and record the word stress using the oO method:

Use ‘o’ to highlight unstressed syllables and ‘O’ to highlight stressed syllables.  For example, the stress is on the second syllable of the word “behavior”:

Be-hav-ior = oOo. 

The stress is on the first syllable of the word “Saturday”:

Sat-ur-day = Ooo  

This has the advantage of recording unstressed as well as stressed syllables. Next, drill this new vocabulary until your students get the hang of it. 

To make drilling more interesting, you can also add an element of drama! Have students say the words while expressing different emotions. Ask them to secretly choose an emotion (e.g. angry/happy/sad/excited), then say the word and have the other students guess what the emotion is.

Don’t forget that you can also drill whole phrases or even sentences. Backchain drilling is a good way to do this and build lower-level learner confidence. It involves breaking phrases into sections and having students repeating them after you, from the end of the phrase to the beginning, in this way:

  • “the test”
  • “pass the test” 
  • “I’m going to pass the test” 

As well as individual sounds and word stress, backchaining also allows you to help students with their intonation and you can also use it to introduce strong and weak forms. It will also be useful to work on multiword expressions and longer phrases with your students.

How is intelligibility scored in the Versant English Test? 

The Versant English Test is used by employers, schools and organisations to assess an individual’s level of English. It covers the two skills of listening and speaking and also includes an Intelligibility Index rating alongside the GSE, Versant and CEFR scores. 

Students will be able to track their speed, clarity, pronunciation and fluency – all important factors when it comes to making sure their speech is intelligible. 

The following chart shows how the index is scored:


This chart offers a way to assess your students’ intelligibility based on the method used in the Versant English Test. By giving them lots of support and pronunciation practice and nurturing their confidence to speak without worrying too much about making mistakes, you can help them to improve their intelligibility over time. 


Do your students sometimes struggle to make themselves understood? How do you help them? Let us know your top tips in the comments! 

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