Find the wrong step. Fix what’s underneath.
Practice real, curated math, Grade 7 through AP Precalculus, plus AMC 8. When a multi-step answer goes wrong, photograph your work. Flax pinpoints the first slip, explains it clearly, and watches for a pattern before assigning a focused repair.
Grade 7 Math
Grade 8 Math
Algebra 1
Algebra 2
AP Precalculus
AMC 8
your work · on paper
4(x - 2 + y)
= 4x - 8
- 4y
The sign changed on line 2
The + y term became −4y. Multiplying by positive 4 keeps it positive: + 4y.
One slip noted · watching for a pattern
A wrong answer becomes evidence, not another score.
Three steps, from the photo of your paper to a repair that actually sticks.
1
Show the work
When a multi-step answer goes wrong, snap a photo of the paper you already used. No retyping the solution into a chat box.
2
Find the first broken step
Flax reads the path line by line, marks the first step that no longer follows, and explains the specific sign, operation, or idea that changed.
3
Repair the pattern, not every slip
One mistake gets noted. If the same gap appears again, Flax builds a focused repair and checks it later inside normal practice.
Learn it, practice it, keep it.
You always know what’s next. Flax keeps bringing each skill back, so it’s still there months later.
Learn it
A short lesson
Practice
Get 4 of 5 right
Review
It comes back the next day
Mastered
Pass the review
Crowned
Still right a week later
A short lesson for the exact gap.
When Flax confirms that a foundation needs work, it starts where you got stuck. Each answer decides whether to clarify, break the step down, or move on to a fresh application.
Start at the missing step
A confirmed gap opens a focused explanation instead of restarting an entire chapter.
Respond, then adjust
Each answer determines whether the lesson gives a hint, asks a smaller question, or moves forward.
Use it in a new problem
The lesson closes by checking the same idea in a different context—not by repeating the example.
Guided lesson
Distributive property
3 of 7
NOTICE
Start with what is happening to the group.
What should we do first?
3(x + 4) = 27
Divide both sides by 3
Exactly.
Dividing by 3 leaves x + 4 = 9. Now the variable is one step away.
YOUR NEXT STEP
x + 4 = 9
Hint ready
Try a guided lesson
One mistake is a note. A pattern changes the lesson.
Here’s what Flax remembers—and what it refuses to assume—from one worked example to a later review.
Step 1
A possible sign gap
4(x - 2 + y) → 4x - 8 - 4y
Flax records the changed sign as evidence. One scan is not enough to assign extra work.
Step 2
The idea is checked quietly
Same foundation · a different problem
Upcoming practice checks whether the same foundation causes trouble again or the first slip was incidental.
Step 3
A five-question repair
Positive factors preserve each term’s sign
Only confirmed gaps become focused foundation practice. You do not restart the chapter.
Step 4
The repair has to hold
5(m + n) → 5m + 5n
The same idea returns later and in a new context before Flax treats the repair as durable.
Written by people, checked by people.
Every question is hand-written and checked by a person, across a real curriculum of 6 courses.
13,800+
Hand-written questions
615 → 697
Course topics mapped to underlying building blocks
6
Courses
Earn coins by learning. Spend them on your buddy.
Finishing practice, finishing a review and repairing a foundation all earn coins. Spend them on hats, capes and colors for your Flax buddy. Purely for fun: coins never change a grade or unlock answers.
Classic crown + hero cape
Modern headphones
Tiny sprout
Classic sunglasses
Start on your own. Bring a class when you’re ready.
The same learning loop works for one student at home or a teacher deciding who needs help next.
Practice without losing the thread.
Pick your course and start at the skill you need. Flax explains scanned work, keeps repairs short, and brings the idea back later to make sure it held.
All 6 courses during the free beta
Progress synced across devices
Start practicing free
See the evidence behind the score.
Assign course skills, follow class progress, and see which confirmed foundation gaps need attention before they keep surfacing in later work.
Assignments and student progress
Class-wide misconception insights
See classroom options
Start for $0.
Every course, scan, guided lesson, and review is available without a credit card.
Pricing details
Questions written by people
No auto-generated filler in the practice banks.
Student work is not an ad product
Scanned photos are not sold or used for advertising.
One miss stays one miss
Flax checks the evidence before assigning foundation work.
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