When “Mastery” Holds Students Back

The other day, I was working with a parent, doing some baseline assessment of her child’s reading, writing and spelling. I found when going through the letter-sound knowledge, he only had knowledge of consonants, vowels, and some digraphs, along with a longer spelling. All the remaining common letter sound combinations were eluding him, including soft c and g, longer vowel spellings, diphthongs, and r-controlled sounds. She let me know that he was kept at a certain ‘level’ for 2 - 3 years, as every time he was tested for ‘mastery’, he didn’t pass. Due to this, he never really got past this stage and was never taught the second half of the ‘concepts’.

This student is now in Year 7, and I have to admit that this really had me thinking, hence the result being this blog post. 

Why Was He Held Back?

As an intervention teacher, I often hear about students not being allowed to progress in a scope and sequence as they haven’t yet mastered the sounds already taught. I am the first to admit that I actually used to do this too. Each time it came to reassessing, if students spelled a word incorrectly, back to that sound/symbol combination we went …… again, ….. and again,..... and, well, you get it.

In many classrooms and also to a degree in my own private practice, students are grouped or “staged” based on spelling performance. (I take into account much more than just spelling, I would like to note). 

The intention behind doing this is good, as we are aiming to fill the gaps, build and ensure understanding, and aim for ‘mastery. But unfortunately, what can often happen is that some students get stuck in their spelling, and therefore, content gets repeated, and as a result, progress slows or stops entirely. This child I assessed didn’t struggle because he couldn’t learn new concepts. He struggled because he was never given access to them.

Why This Is a Problem

When we hold students at a level based solely on spelling accuracy, we can unintentionally create a bottleneck. Let’s think about the three pillars of our language - phonology, morphology and etymology. Let’s also think about the Simple View of Reading, reading comprehension is the product of:

• Decoding (word reading)

• Language comprehension 

And when we think about writing, frameworks like the Simple View of Writing remind us that writing also includes:

• Transcription (spelling and handwriting)

• Composition (ideas, vocabulary, sentence structure etc)

Let’s now think about this: spelling is only one part of literacy.

If we over-focus on spelling, we neglect the bigger picture, and then we see a combination of this happening:

• Students miss exposure to complex vocabulary

• They have limited exposure to multi-syllable words

• Their writing ideas stay simple

• Their reading, writing, and spelling growth is limited

We do not want to unintentionally create a situation where we have held back students, based on their ability to spell a word with a given sound/spelling combination. And let’s really think about this here….. If a student can’t spell the word match, does that mean they can’t spell all the words with the ‘tch’ pattern, or indeed read them, or indeed understand them? Why are we reteaching that entire sound and symbol combination as a rinse and repeat?

What Does “Mastery” Really Mean?

This is where I think we need to pause, reflect and rethink. Let’s think about what mastery doesn’t mean. It does NOT mean perfection, and it does NOT mean 100% spelling accuracy before moving on.

To me, mastery means:

👉 The ability to decode words for reading
👉 The ability to encode words for spelling (with growing accuracy)
👉 The ability to apply knowledge in context

Mastery is flexible, developing, and above all, in a state of constant progress because literacy isn’t a linear process.

Why We Need to Reshape Our Thinking

If we treat mastery as a fixed checkpoint, we begin to create these unintentional barriers to learning. However, if we treat mastery as a continuum, we create opportunity. 

Students benefit from being exposed to complex language, even if they can’t yet master the spelling of every word. E.D. Hirsch (2003) emphasised that background knowledge and vocabulary grow through exposure to rich language, not simplified content. 

We also know that reading supports spelling development, and vice versa. Linnea Ehri (1997, 2014) showed that orthographic mapping links reading and spelling, and both strengthen each other through repeated exposure. Louisa Moats has long argued that spelling is a window into reading development, and both should be taught in connection.

Finally, vocabulary and knowledge grow through access, not restriction, and holding students back until everything is ‘perfect’ doesn’t build this; all it builds is frustration for the learner and the learner's parents. Daniel Willingham (2006) showed that comprehension depends heavily on background knowledge, not just skill. John Sweller (Cognitive Load Theory) suggests that overloading working memory with perfection demands can hinder learning.

How We Can Do This Differently

In New Zealand, we are navigating a shift in how we teach literacy. It can be daunting to consider all of these little nuances of learning. I’ve popped together a few things that have changed the way I teach over the years, as small changes can create big impacts. Here’s what this can look like in practice:

1. Teach Forward, Not Just Backward

Yes, we fill gaps, but we also move forward. We can do this by introducing new patterns, but at the same time reviewing the work we have already done. We MUST explore longer words, and we can do this effectively by building in morphology (prefixes, suffixes, base words) and exploring words through etymology.

2. Separate Reading and Spelling Decisions

I’ve blogged about this before, but we must separate reading and spelling decisions. A student can read more complex words and understand deeper ideas, even if their spelling and writing are not there yet. 

3. Use Supported Exposure

Instead of waiting for readiness, create it. This can be done by reading aloud rich texts, pre-teaching vocabulary, activating background knowledge, and using partner reading or teacher modelling. 

4. Teach Words in Context

We need to ensure we are not teaching words in isolated chunks. In order to really orthographically map a word, we must make meaning alongside the structure. 

5. Redefine Success

Success and mastery should not be looked at as:

• “Got them all right on the test”

Success is:

• “Can read it”

• “Can attempt to spell it”

• “Can use it in writing”

• “Can understand it and use it within oral language”

What This Means for This Year 7 Student

For this student, the goal now is not to go back and “redo everything.” I have my starting point, and over the following weeks, we are going to fast-track his success. Over the coming weeks, I am going to rebuild his foundational gaps strategically. I will be introducing multi-syllable words alongside affixing and base words. I am going to show him how the English language is pattern-based and how we can look at word parts to strengthen decoding across longer and more complex words. I will aim to support his writing without overloading spelling demands.

We will move forward with support.

Final Thought

If we misunderstand mastery, we risk slowing down the very learners we are trying to support. But when we shift our thinking, and when we allow students access to richer language, we can trust that learning will happen, and that’s when we see growth.