How to Teach Students to Show Their Work on STAAR Math Problems

If you've ever watched a student stare at a STAAR math problem, write a number on the answer line, and move to the next question — no scratch work, no equation, nothing to show their thinking — you know the particular frustration of seeing a wrong answer with no way to figure out where the breakdown happened.

The "won't show work" problem is older than STAAR, but it's especially costly on a timed test. Students who don't show work make more careless errors, check fewer answers, and have no recovery path when they get stuck mid-problem. Teaching your students to show work isn't about compliance or a classroom rule. It's about giving them a tool that makes them more accurate under pressure.

Why Students Don't Show Work on STAAR Math (It's Not Laziness)

The most common explanation teachers reach for: "They're just lazy." That's not quite right, and it matters because the real reasons point to different solutions.

Students skip showing work on math tests for a few distinct reasons:

• They think showing work is slower. They've learned that if they can do the arithmetic in their head, writing it down wastes time. What they don't understand yet is that written work is actually faster when problems get harder, because the working memory load drops.
• They're afraid to show wrong thinking. Some students have learned that showing work means showing mistakes, and they'd rather turn in a blank margin than reveal they went down the wrong path.
• They've never been taught what "show work" means. "Show your work" is one of the most routinely assigned and least explicitly taught skills in math education. Students often genuinely don't know what counts.
• They do mental math and can't write it down. Strong mental math students often haven't made their steps visible before, and asking them to do so feels unnatural.

Each of these needs a different response. Telling a student to "just show their work" addresses none of them.

Action step: The next time a student turns in a math assignment without work shown, don't just mark it wrong. Sit with them for 90 seconds and ask them to explain how they got each answer out loud. Watch for which of the patterns above shows up. That tells you what to teach.

Selling Students on Why It's Worth Doing

Before you teach students to show work, you have to convince them it's worth doing. This is a sales problem as much as an instructional problem.

The argument that works with middle schoolers: showing work is how you check your own answer without starting over. When you have scratch work, you can look at your steps, find where you went wrong, and fix it in 30 seconds. When you don't, checking means solving the whole problem again. Under time pressure, students who can check efficiently have a real advantage — and students who made a careless arithmetic error can actually catch and fix it before moving on.

The argument that works with elementary students: your work is your proof. On a STAAR math item, nobody can see inside your head. Your work on the page is the only record of what you understood. If your answer is wrong but your work shows you had the right concept, your teacher knows you were close. If your page is blank, there's nothing to show for your thinking.

Make it explicit. "I'm teaching you to show work because it makes you faster, not slower, when the problems get hard. Let me show you why." Then demonstrate it.

Action step: Find a multi-step problem your class has recently worked on. Do it two ways on the board: once with all steps written, once with just the answer. Deliberately make a computation error in the "just the answer" version. Show how the written-work version lets you find and fix the error. Let students see the payoff before you ask them to do it.

What Counts as Showing Work — and What Doesn't

If you tell students to "show work" without defining what that means, you'll get students who write one number in the margin and claim they've shown their work. Set a standard and teach it explicitly.

Minimum standard for STAAR math work:

• Write the equation or expression you're solving. Not just the answer — the setup that gets you to the answer.
• Show each computation step. If you're multiplying, write the multiplication. If you're substituting into a formula, write the formula with values filled in.
• Label what you're finding on multi-step problems. If there are two steps, label step 1 and step 2 so anyone checking your work — including you — can follow the logic.
• Write units where appropriate. This forces students to think about what their number represents, which catches unit errors before they happen.

What doesn't count: underlining parts of the problem, writing the answer twice, copying the question, or drawing a box around the final answer without any computation visible. These are the gestures of showing work, not the substance of it.

Action step: Create a "what counts as work" anchor chart with your class. Include examples of insufficient work (just a number), partial work (one step shown), and complete work (all steps visible). Post it in your classroom and refer back to it every time you return a test or assignment for the first few months.

Building the Habit Before STAAR Season

The worst time to start requiring students to show work is in March. By then, habits are locked in and you'll be fighting every kid who thinks the step is slowing them down. The habits have to be built in fall, as normal classroom practice, not as emergency test prep.

Practical ways to build the habit early:

• Grade the work, not just the answer. If correct answers with no work shown get partial credit, students learn fast that the work matters. If the answer is always worth full credit regardless, there's no incentive to change.
• Use "show two ways" problems. Ask students to solve a problem two different ways and show work for both. This makes the work the product, not just a byproduct of getting the answer.
• Run gallery walks with student work samples. Post anonymized examples of strong work and weak work. Have students evaluate them using your criteria. Students who see strong work modeled will start imitating it.
• Do "work without numbers" problems. Give a problem where all values are replaced with variables or blanks. Students have to write the process without computing. This makes the structure of the work visible in a way that computing doesn't.

Action step: This week, collect one assignment and grade it with full credit only for problems where the work meets your standard. Write "please show full work" on problems with missing steps and return them for a redo. Do this consistently for two months and the habits will shift.

The Student Who Genuinely Does It in Their Head

There is a real category of students — usually your strongest math kids — who genuinely do multi-step arithmetic mentally and find writing it down genuinely frustrating. These students need a different conversation, not the same one you'd have with a student who's avoiding work.

Tell them: "I believe you can do this in your head. But STAAR doesn't give extra credit for mental math — it gives credit for the answer. On a longer problem, when you're tired and it's been two hours, mental math fails in ways that written work doesn't. Building this habit now protects your score on the hard problems."

Also, these students often get harder problems wrong because they race past the setup and misread what's being asked. Requiring them to write the setup — just the setup, before computing — catches that error before it costs them a question they absolutely should have gotten right.

If you want STAAR-aligned math practice with workspace built in for showing work, the TestPrepGrow content library has grade-specific math resources organized by reporting category. Worth browsing when you need practice that scaffolds the work-showing process rather than fighting it.