🧮 Built for Illustrative Mathematics classrooms

You invested in Illustrative Math. Make sure independent practice delivers.

Simili brings IM's discourse approach into the 33% of class where students work alone—automatic differentiation, zero extra prep for teachers.

Become a Pilot Partner →

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"I think 5/8 is bigger because 8 is more pieces..."

Interesting! Let me draw that...

5/8

5/6

Which shaded part is bigger?

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👧

"Oh! The sixths are bigger pieces!" 💡

From our research with 50+ teachers

"I want to see the student's work in order to understand their misconceptions"

— 3rd Grade Teacher, CA • 8 years teaching

The 40% Problem

40% of every IM math block happens during practice—
when differentiation is hardest to deliver.

⏱️

33%

of math class is independent practice

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minutes average practice time

👂

3-4

students you can actually hear think

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reasoning captured from the rest

😔 Right now

→ Students work alone, in silence
→ You find out what went wrong... tomorrow
→ Misconceptions practiced 15+ times before caught
→ Differentiation takes hours of prep you don't have

✨ With Simili

✓ Every student has a curious thinking partner
✓ Misconceptions caught during practice
✓ Students discover their own errors (durable learning)
✓ Differentiation happens automatically—zero prep

How Simili Works

Three things that make math click.

Start with wonder

Problems begin with the IM lesson's 'I wonder' moment—real contexts that make fractions tangible, not abstract.

"Which pizza slice is bigger—from a pizza cut into 6 or 8?"

See the thinking

When a student says '3/8 is bigger because 8 is bigger,' Simili doesn't mark it wrong. It names the misconception.

Natural number bias detected → surfaces to your dashboard

Mirror, don't tell

Instead of hints or explanations, Simili draws what the student described—letting them see and self-correct.

"Let me draw that..." → student discovers the gap

Beyond right/wrong. Beyond hints.

What makes Simili different from what you might be using.

	Math Skill Practice Tools	AI Tutoring Chatbots	Assessment Analysis Tools	Simili
Starts with...	Abstract problem	General context	Student's work	IM lesson context
Finds misconceptions	❌ Just right/wrong	🟡 Partial	🟡 After the fact	✅ Real-time + specific
Helps student...	After they submit	When they ask	Next day	During practice
How it helps	Shows answer	Gives hints	Teacher reviews	Mirrors thinking back
Teacher gets...	Scores	Progress %	Analysis report	Misconception patterns
IM alignment	Standards only	Generic	Curriculum-agnostic	Lesson-level

Made for Illustrative Mathematics

We didn't just read the standards.
We read the teacher guides.

Simili is built on deep knowledge of IM's learning progressions, common misconceptions, and the discourse moves that make IM work.

✓ Problems aligned to specific IM lessons, not just standards
✓ Misconception libraries from IM teacher guides
✓ Discourse moves that extend whole-group into practice
✓ Dashboard shows who needs what—no analysis required

Currently building:

Grade 3, Unit 5: Fractions as Numbers

📚 Lessons mapped 17 of 17

🔍 Misconceptions catalogued 23

💬 Discourse moves 47

🎨 Visual representations 12 types

Expanding to Grades 4-5 in 2025 📈

For Teachers

Small groups, warm-ups, and next steps—all ready to go.

Simili handles 1:1 support during practice, then shows you exactly how to follow up: who to group, what to teach, and how to start tomorrow.

Grade 3 • Unit 5 • Lesson 16

Compare Fractions with Same Numerator

students practiced

👥 SMALL GROUP RECOMMENDATION

Natural Number Bias Group

These 8 students think "5/8 > 5/6 because 8 is bigger"

Marcus Aisha Devon +5 more

Recommended focus:

Part-size visualization with fraction bars

✨ EXTENSION GROUP

Part-Size Reasoning Mastery

15 students explained: "fewer pieces = bigger pieces"

Ready for Lesson 17 material

Recommended focus:

Comparing fractions with different numerators

📋 READY-TO-USE WARM-UP FOR TOMORROW

Draw two same-size rectangles. Cut one into 6 parts, one into 8 parts. Ask: "Which has bigger pieces? How do you know?"

Targets:

Natural number bias (8 students)

From:

IM Lesson 16 teacher guide

No grading. No analysis. No planning.

Just open the dashboard—your groups are formed, your warm-up is written, and your next teaching move is clear.

Our theory of change

Better math outcomes come from students explaining their thinking—and catching misconceptions before they solidify.

Students explain their thinking in real-time

During practice, not after. When misconceptions are fresh and fixable—not after 15 problems of practice.

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Misconceptions surface and get named

Not just "wrong"—specific patterns like natural number bias. Teachers see who needs what, grouped automatically.

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Teachers intervene with precision

Small groups formed. Warm-ups written. Next teaching moves clear—all from IM teacher guides. Zero hours of prep.

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🎯

Students master concepts that used to slip through

Not because they got more practice problems—because they got caught and corrected when it mattered.

One speaks AI. One speaks classroom.

Together, building what works in both worlds.

👩‍💻

Vaish

Product & AI

👩‍🏫

Amber

10+ yrs teaching

Help us build this right.

We're looking for 3-5 pilot classrooms to partner with this spring. Grade 3. Unit 5 (Fractions). Teachers using Illustrative Math who want to see how their students really think.

You'll shape what Simili becomes—and your students get a thinking partner before anyone else.