How to Stop Students from Second-Guessing on Math Exams


Are your students constantly erasing correct answers and second-guessing themselves? Veteran teachers offer their best advice to new teachers.

The brain is a funny thing. We've evolved these giant frontal lobes that can plan years in advance, but throw in a bit of test anxiety and we're suddenly running from a lion at dusk. When the brain detects danger, that massive frontal cortex shuts off and is just there taking up space.


If I had to estimate, every single student I have ever had in any of my special education math classes has had some level math anxiety. I have my theories as to why this is, but in this post I want to instead focus on ways to help students overcome this anxiety when taking tests so that they don't doubt their answers.  


How to stop students second-guessing their math


I asked teachers on Facebook what they do to help students with this, and got a bunch of great advice. Their advice is below. If you'd like to read the original thread, it's here.


Check your work Your gut is mostly right. - Dan D 


By teaching them to be able to ask themselves why they did what they did.... in other words, By teaching them not to guess the first time 😛 . I notice it happens most often when it "doesn't look right" -- by their old way of thinking. "It's not what it looks like, it's what it means!" (so -- change 2.4 to a percent.... if they remind themselves that 1 is 100% because it's the whole thing...) If it is a multiple choice test -- one of the choices will BE the "second guess" answer. If they know that.... - Susan J 


They have to explain exactly why they are changing their answer. Can they show incorrect math? Did they miss a word in the question? - Kathryn L 


Another rule I had was that I wouldn't receive a test before the time limit was up with blank questions. Once submitted, they wouldn't get it back, so I told them to keep it at their desk so they have an opportunity to fill in empty spaces - Tamara M


Don’t “second guess” but always double check - David C 


I tell them not to change an answer unless they are absolutely sure they made an error. - Lindsay S 


I tell them the strategy is: if you go back you may not change steps. Only recalculate answers. And if you get a different answer do it again. If that number doesn’t match the first LEAVE IT ALONE 🤣 - Erin C 


To trust their instinctual thoughts, and trust in how they were taught, by me. Instill that they are now the expert and no need to second guess. - Cameron S 


I told them only change it if you can give a reason that its wrong...you see you misread or missed information etc - Susan S 


I encourage kids to finish the test before going back and checking. And my mantra is “Don’t erase until you can replace!” - Dina L 


Ooh interesting question! I found this happened more often with my traditionally educated students who had a lot of testing. For my homeschooled students, they seem more inclined to go with their gut instincts without giving a second thought about it. I haven’t taught as many homeschoolers with testing though. - Jean H 


I guess it depends if their work is making sense to them. Sometimes a kid’s first instinct is a mistake… - Helen H 


I use practice tests and test talks. - Renae B 


I had a rule: do not erase unless you can replace. I had many students that would second guess and erase a solution that was correct, or partially correct, but then put nothing in its place. So I started encouraging them that it is better to keep your initial answer there, because you might be right. But if you submit nothing, you guarantee that you get zero for that question. So I told them only to wear their work when they had a clear idea of what they wanted to replace it with - Tamara M 


A basic starting point was to ask them everytime they turned something in (not just tests), "How did you do?" Most would look surprised. "I don't know, you haven't graded it yet". Getting them to recognize their own perceptions - Vicki H 


I gave a student 2 answer sheets. One for her original answers, the other for her second guesses. I graded both. She always scored better on the original. - Peggy S 


I say it out loud throughout the year. I constantly tell them to believe in themselves and don’t second guess themselves. And when they ask for help, I always ask what they think and never give them answers. We work towards answers together if needed. - Danielle H 


During assignments when they ask for help I ask them “what do they want to do” or “what is your first thought to do” and then tell them to try that. Usually they are right or they can figure out what to do from there. I sometimes make a show out of it saying “what am I even here for, you knew what to do all along” or something like that. I just build their confidence during assignments and work time so they learn to trust themselves and to try during a test. - Jillian M 


Not sure that I’ve taught them that, but we go over questions and talk about the incorrect answers and why they are incorrect, as well as choosing the correct answer. 🙂 - Kristin H 


Always questions To help guide them in the right direction and then I use the mantra, especially in math, “when in doubt, draw it out” - Theresa D 


IMHO teach them to trust the process. Teach them good habits. Teach them how to double and triple check their answers. How to work the puzzle from multiple angles. Cause the real world doesn’t accept close. Doesn’t care about wrong answers. The world doesn’t care about your gut. It cares about being able to explain your answers so that others can agree that the right thing was being calculated. - John R 


For in class tests that were not very basic questions, we put the answers on the test and told the kids we were grading their work. - Kasey N 


Yes! Always go with your gut instinct. - Michael S 


Give them practice in class without assistance until they build that confidence. - Teracita L 


I teach them to use their number sense (estimating, should it increase/decrease, should it be a positive/negative slope, etc)to figure out if their answer makes sense! - Amanda B 


Before I pass out the tests to the class. Students put all belongings under their desk including pencil. I give them 1 minute to read the test. Then they have 2 minutes to do a test talk. They can collaborate with anyone in the room except me. They are not allowed to “give answers”, only clarify strategies. Nearly all my students said it decreased anxiety for them and helped them get off to a confident start (not second guessing themselves). - Sharon N


I have pointed out to students that a test is just a simple piece of paper that easily rips, and to pretend it's just classwork or a warm-up. A couple years I've even had some kids come to the front to punch the test. This probably isn't the best advice, or even appropriate, but it was effective for a few kids who couldn't get out of their own way.


What would you add? What has worked for your students? 





Compound Interest Cheat Sheet

In this post, is the free compound interest reference sheet we use during our exponential functions unit in algebra 2.

This week, the plan is to finish learning about compound interest so that we can squeeze in projectile motion next week before starting final exam review the week after. It'll be tight, but that's the goal! Hard to believe there are only a few weeks left.


We started our exponential functions unit learning how to graph exponential functions by building tables, identifying a and b given a table, and writing the equations of exponential graphs with the y-intercept and f(1) highlighted.



We then moved on to compound interest compounding annually, then compounding more often. Today students started a compound interest escape room that covers compounding annually, quarterly, monthly, and daily. The escape room also comes as self-checking digital, but we used the printable version. It's more forgiving and keeps students offline.


Free Exponential Functions Growth - Decay - Compound Interest Cheat Sheet


Today, I made students this exponential functions cheat sheet that they can use as we finish up the escape room, exponential decay, and on their upcoming quiz as an IEP accommodation.


For decay, I may also give students this friendly percents reference depending on how things go. We may just stick with (1 - r), but I'd like them to have another perspective for finding the base of decay functions.



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Summer Math Summit 2026: Free PD for Math Teachers



I'm honored to have been invited to present at this year's Summer Math Summit-- a free math PD event running from June 25-28, 2026.


The Summer Math Summit is a free virtual conference for pre-K through high school, focusing on practical strategies for the math classroom. 




This year there are over 50 sessions to watch, three live make-and take-sessions, and virtual hangouts. There's even a free app this year if you're on the beach and want to watch sessions on your phone.

When you click to get your free ticket, there will be the option to upgrade to a VIP ticket. The VIP ticket comes with a 22 hour PD certificate, an extended 6-month window to watch the sessions, and a pack of math freebies.  






My session this year Algebra Tiles in Action covers factoring quadratics with algebra tiles, from simple trinomials with a leading coefficient of 1 and all terms are positive, to non-prime leading coefficients with negative terms. 




My session will be an extension of the algebra tiles reels I've been sharing on Instagram and Facebook all in one video with extra explanations. 




Here is a list of Summer Math Summit sessions this year

  • Helping Students Actually Understand Word Problems (Not Just Solve Them) - Michelle Muggridge 
  • Why Your Best Lessons Fall Flat (And How You Can Fix That) - Asia Hines 
  • Building a Growth Mindset in Math - Terri Browne 
  • Math Stations That Actually Work: A 4-Station System for Stations & Small Groups for Middle School - Twana Kennedy 
  • 5 Steps to Help Students Conquer Tricky Math Lessons - Lauren Casias 
  • Engaging the Middle School Math Brain - Ellen Levin 
  • Mastering Math Vocabulary: Helping Students Understand What Math Questions Are Really Asking - Emily Upton 
  • Track Less, Teach Better: A Smarter Approach to Progress Monitoring - Alexandra Brady 
  • Math That Feels Different: The Sneaky Learning Shift - Chloe Campbell 
  • Interactive Notebooks Made Simple: 4 High-Impact Foldable Templates for Any Grade Level (K–6) - Crystal Mencia 
  • One Task, Many Thinkers: Differentiating Math Instruction Without More Time or Prep - Nakasha Kirkland 
  • Design Your Own Collaborative Math & Art Projects - Marta Czyrkiewicz 
  • Captivate Your Students! Engaging Middle School Math Minds - Kelly Hoffmann
  • Math Wheels: Visual Notes for New Learning, Practice & Review - Ellie Nixon
  • Making Algebraic Expressions Make Sense - Carrie Wiederholz 
  • Thinking Outside the Box for Spiral Review - Tyra Frederick Bauer 
  • Guided Math Lessons That Build Independence: Helping Students Take Ownership of Their Learning - Heather Bednar 
  • Rethinking Spiraled Math Practice (Without the Grading Spiral) - Morgan Gariano
  • Relationships Before Rigor: Engaging Students Through Meaningful Connections - Samantha Hutton 
  • Quick Writes, Big Impact: Adding Writing to Any Math Lesson - Karrie Everett
  • Empathy in the Math Classroom: How to Build a Relationship with Students Who Refuse to Work - Robin Cornecki 
  • Talk Math to Me: Easy Ways to Boost Student Communication in the Secondary Math Classroom - Erica Higashi 
  • When Students Say “I Don’t Know”: Building Productive Struggle in Secondary Math - Catalina Perricone 
  • Math Moments for Non-Math Teachers: Build Confidence Through Student-Powered Story Problems - Kaci Bolls 
  • Count It. Say It. Write It. Daily Math Routines That Build Number Fluency - Keri Brown 
  • The Power of Projects in Secondary Math - Emily Wilde 
  • Beyond Worksheets: Building Foundational Math through Art - Faigie Kobre
  • Simplifying Math Stations: A Practical 3-Station Framework - Cassie Pistoor
  • Beyond the Study Guide: Test Prep Strategies for Middle and High School - Caroline Chaput 
  • Building a Sustainable & Inclusive Middle School Math Classroom - Alissa Hinz
  • Word Problems are Figureoutable: A Simple System That Works - Missy Johnson
  • Math 360: Quick Formative Assessment That Drives Small Group Instruction - Kristy Johnson 
  • Decoding Division: A 10-Step Framework for Building Confident Dividers (Grades 4–8) - Sarah Noseworthy 
  • Review That Doesn’t Feel Like Review: Plug-and-Play Scavenger Hunts for Grades 5–9 - Sandra Orrego Jimenez 
  • Leveraging Base 10 Understanding to Help Students Mentally Add Within 100 - Jennifer Foreman 
  • Proofs with Purpose: Making Geometry Proofs Practical and Powerful - Jessica Siebert 
  • Overcoming Spiral Review Challenges: Building Student Endurance, Independence, and Data-Driven Next Steps - Teresa Gomez 
  • Design for Clarity: Mastering Your Math Instruction in 4 Easy Steps - Cassie Tabrizi 
  • Turn Any Math Worksheet into a HOTS Challenge - Sabah Hassan 
  • Growth Mindset Strategies to Start the Year off Right - Beverley Manikoth 
  • Why Isn’t This Clicking? How to Identify and Support Math Gaps in K–2 Students - Zeba McGibbon 
  • The Power of Number Talks (Upper Elementary) - Holly Alexander 
  • Level Up Your Math Lessons with Canva - Teresa Kwant 
  • Math in Motion: Bringing K–2 Learning to Life Through Movement - Andriana Zarovska 
  • Two Truths and a Lie: The 5-Minute Math Routine That Gets Every Student Thinking - Kamal Bilkhu 
  • Algebra Tiles in Action - Shana McKay







If you'd like a 22-hour PD certificate and 180 days to watch the sessions, the option for a VIP ticket should pop up as you grab your free ticket.



Free Summer Math Summit ticket








2 Percent of a Number Cheat Sheets


In this post, there are two free percent of a number cheat sheets for a consumer math unit on calculating percentages of numbers and calculating discounts. Each can be added to student notebooks as a reference when learning how to calculate percentages.


Percent of a number cheat sheet
Percent of a number cheat sheet

The first percent sheet reminds students of the divisor when calculating the percent of a number. For example, We can divide 125 by 5 to find that 25 is 20% of 125. This sheet prints on half a page to fit into a student notebook.


Friendly percentages cheat sheet
Friendly percentages cheat sheet


The second is a friendly percentages reference that's helpful for calculating discounts. If a shirt is 15% off, we can calculate the shirt's price by finding 85% of the original cost of the shirt. I always find this easier than calculating 15% then subtracting that amount from the original price.

This friendly percentages sheet can also be referenced during an exponentials unit when calculating decay. If the value of a car is depreciating by 15% per year, we can use .85 as the exponential's base.



The two sheets are found free in the same download here: Free percent of a number cheat sheets



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How to Write an Exponential Function Equation Reference Sheet

how to write exponential function from table free step-by-step guide sheet

It's almost the Massachusetts version of spring break here (April vacation), term 4 just started (hard to believe!) and we just began on our exponentials unit in algebra 2. This is going to be a super short post just to share a cheat sheet to help students remember how to write an exponential function equation given two points.



The sheet walks students through how to write exponential function equations from a table of values, including the y-intercept and one other point. Students are shown how to solve for the exponential's base b, then how to write the equation using this base and information from the table.


You can download this cheat sheet free here.



Normal Distribution Curve Reference Sheet in Algebra 2 Statistics

 Normal distribution curve reference sheet for algebra 2 statistics

We started our statistics unit in algebra 2 and so far have reviewed box and whiskers plots, dot plots, histograms and learned about skewed data, interquartile range and experimental vs. observational studies. Last week, we started learning about normal distribution and will be on this topic for a little while. We move onto z scores tomorrow.


We gave students a simplified version of the curve with whole number percentages to make calculations easier to manage. I wanted to share this reference with you in case it would be helpful for your students, too. If you'd rather keep the decimals in the percentages, there's also a blank curve in the file.


We printed a bunch on this orange paper (the orange reminded me of that funny normal distribution ghost meme) and laminated them so that students can write on their curves while working.




You can download this normal curve reference here from my Google Drive.


Probability error analysis activity
Probability error analysis

If you teach probability, I recently made a "2 truths and a lie" error analysis activity that covers independent and dependent compound probability.


This data and statistics activity can either be used as a review of mean, median, mode, outlier, skew, dot plot, histogram, box and whiskers, or as an introduction to a statistics unit in algebra as a way to refresh student memories of these topics.
Data and Statistics Activity

Before we got into symmetrical data analysis, we reviewed skewed data and completed this data and statistics activity. It covers mean, median, mode, skew, histograms, dot plots and box and whiskers plots.


Browse statistics activities


More algebra 2 activities




Factoring Trinomials with Algebra Tiles Visual Guide


This scaffolded visual guide walks through 10 examples showing how to factor quadratic trinomials using algebra tiles.


This week, I worked on a visual guide for how to factor quadratic trinomials using algebra tiles. It has 10 examples, and each example includes the number of tiles needed with any zero pairs, notes about the example and a common student misconception about arranging the tiles for that trinomial. 



If you have never used algebra tiles to factor trinomials and want to give them a try, I wrote this guide to make it easy to get started.



The printable guide includes 10 trinomial examples, common student misconceptions, and the correct algebra tile arrangement.


The guide covers quadratic trinomials where A=1 and where A>1, including when zero pairs are needed because of negative C values. 



There are 10 factoring examples in the guide with their common misconceptions, along with 2 additional examples for simplifying a quadratic expression in vertex form and solving a quadratic equation by completing the square.



This preview slide shows the trinomial examples included, including trinomials with leading coefficients more than 1. Using algebra tiles to complete the square to solve a quadratic equation is also included.


I've been making algebra tiles factoring videos for social media and YouTube, and thought it would be nice to have a printable algebra tiles visual guide that also shows some of the misconceptions students may have about arranging the algebra tiles when factoring quadratics.


Examples in the guide include:

  • x2 + 5x + 4 
  • x2 – x – 6 
  • x2 + x – 6 
  • x2 + 5x – 6 
  • x2 – 4x + 3 
  • x2 – 9 
  • 2x2 + 7x + 3 
  • 2x2 + x – 1 
  • 3x2 + 4x + 1 
  • 3x2 + x – 2
  • Simplify (x + 3)2 – 4 
  • Solve x2 + 2x = 3 by completing the square


If you find there's an example you'd like added to the guide, please send me an email. I'm happy to add it in. You can find the guide here.


Factoring Quadratic Trinomials with Algebra Tiles Visual eBook Guide
Algebra Tiles Visual Guide


Algebra tiles connect nicely to the area (box) model of factoring trinomials for when it's time to move past these concrete models. There's a free factoring quadratics cheat sheet here for the area model, along with one for the AC grouping method. 


2 free factoring trinomials cheat sheets
factoring trinomials cheat sheets

I like to teach the AC grouping method to students who struggle with multiplication facts because it takes out all guessing, but the box method has been growing on me! It's like a puzzle for students to figure out.



Additional resources:


Algebra tiles blog posts


Algebra tiles YouTube playlist


Algebra tiles reels on Facebook