Practice that reveals a picture
Every right answer uncovers another band of a hidden pixel-art picture. Wrong answers turn red, so students fix their own mistakes, and by the last problem the whole picture is on screen and every answer has been checked. 3 sets, 24 problems each.
One link, no grading
A live SOLVED counter shows students how far they have come.
- 1
Post one link
Each student gets their own copy of the Google Sheet. There is nothing to set up or print.
- 2
Answer a problem
Students type an answer and press Enter, or pick it from a dropdown in the Rational Number Operations set.
- 3
Green reveals the picture
A right answer turns green, uncovers another band of the hidden pixel-art picture and adds one to the SOLVED counter.
- 4
Red means try again
A wrong answer turns red, and no picture shows until it is right, so students catch their own mistakes.
3 topics, two pictures each
Two levels, two pictures
Level 2 is the harder skill, so students who finish early move on without spoiling Level 1 for anyone still working.
| Set | Grade | Level 1 | Level 2 | Answers | Standards |
|---|---|---|---|---|---|
| Integer Operations (free) | 7th Grade | Adding and subtracting integers Reveals a calculator | Multiplying and dividing integers Reveals a rocket | Typed | 7.NS.A.1, 7.NS.A.2 |
| One-Step Equations | 6th Grade | Solving one-step addition and subtraction equations Reveals a pencil | Solving one-step multiplication and division equations Reveals a trophy | Typed | 6.EE.B.7 |
| Rational Number Operations | 7th Grade | Adding and subtracting rational numbers (positive and negative fractions and decimals) Reveals a beaker | Multiplying and dividing rational numbers Reveals a lightbulb | Dropdown | 7.NS.A.1, 7.NS.A.2 |
No prep, no grading
- No grading: the Sheet checks every answer, and printable answer keys come in the PDF
- Two levels and two pictures in every set, so early finishers move to Level 2 without spoiling Level 1
- Works on Chromebooks, laptops and tablets
- Fits stations, homework, early finishers and sub days
Mistake of the Week
A five-minute Monday routine: students find a mistake, fix it and explain the rule, twelve weeks per grade.
Mystery Picture questions
Do I need to set anything up?
No. Post the link. It makes each student their own copy of the Google Sheet, and the answer key is hidden inside it.
What happens when a student gets one wrong?
The answer turns red and no part of the picture appears until it is right. In the Rational Number Operations set every wrong choice is a common mistake, so a wrong pick is worth a conversation.
How many problems are in each set?
24 problems: two levels of 12, each level with its own picture.
Is one free?
Yes. Integer Operations (7th grade) is free on TPT.
Standard codes refer to the Common Core State Standards for Mathematics. Math Class 678 is an independent publisher, not affiliated with, sponsored by, or endorsed by NGA Center or CCSSO. Every product is sold on Teachers Pay Teachers.