How It Works
For math, every concept has a structured lesson that teaches it — with stories, guided examples, and hands-on activities. After each lesson, the adaptive engine gives practice that adjusts with their responses. For reading, 157 structured lessons teach your child to read while the engine reinforces every skill. Science is on-screen lessons, not labs. Pre-K begins gently without placement. When a parent opens the Kindergarten transition, families can browse teaching lessons or use optional placement for adaptive practice.
Two ways to start
Ages 3–5 can begin directly in Pre-K with letters, counting, shapes, routines, and short playful practice. There is no placement test and no automatic access to older work. Pre-K progress builds a visible bridge, but the parent decides when Kindergarten opens.
For Kindergarten and older children, you can choose math lessons by grade and topic, like a workbook. Placement is optional. A short adaptive quiz can help find a starting point for practice, or you can skip it and start from the age-based level. Choosing a library grade does not change practice settings.
Kindergarten+ placement
Addition Within 5
Passed (2/2) — skip ahead
Addition Within 20
Passed (2/3) — advance
Addition Within 100
Not passed — step back
Addition Within 10
Passed (2/2)
Start here: Addition Within 100
Not passed — daily work begins here. Highest passed: Addition Within 20
We use automated tests, lesson walkthroughs, and parent feedback to find and fix problems. Review is ongoing. If a question or explanation looks wrong, use the lesson's report button or send feedback from your dashboard.
Every day after that
Pre-K starts with about five minutes of daily practice, plus optional stories, lessons, and science. Kindergarten and up typically takes 15–20 minutes per session. The lesson teaches. Practice helps it stick. You get to watch them learn.
For math, your child starts each concept with a structured lesson — a read-aloud story that introduces the idea, walks through guided examples, and checks understanding with a short quiz. Every skill from counting to algebra has its own lesson. After finishing a lesson, your child moves straight into adaptive practice on that same skill.
The adaptive engine adjusts difficulty based on how your child responds. Struggling? It steps back and reinforces the foundation. Breezing through? It moves forward. The placement test determines where lessons start — a child who places at 3rd grade never sees the kindergarten lessons they've already mastered.
Behind the scenes
Score-band difficulty
Practice items get easier or harder from recent accuracy — not a 3-in-a-row rule
Mastery is 0.85 / 10
A skill is mastered after 85% on the last 10 attempts, not two lucky answers
Consistent accuracy
System advances to next skill
Most curricula teach a concept, test it once, and move on. Lumastery brings it back. A skill your child learned on Monday is revisited on Thursday, then the following week, then two weeks later.
This is spaced repetition — the same evidence-based technique that makes language learning apps effective, applied to math and reading skills. A skill is marked “mastered” at 0.85 over the last 10 attempts. Review uses SM-2 intervals when a review item actually fires — the cartoon below is a storyboard, not the live scheduler. Arithmetic-chain skills are not spaced-reviewed.
Illustration — not the live SM-2 schedule
Structured math lessons
Before your child ever sees a practice problem, they get a structured lesson that teaches the concept. Each lesson uses a read-aloud story, visual examples, hands-on activities, and a short quiz — designed to be done together in about 10–15 minutes.
Every math skill from counting and number recognition through fractions, decimals, algebra, and statistics has its own lesson. After each one, a “Practice This Skill” button takes your child directly into adaptive practice on that exact concept. The lesson teaches the idea. The engine makes sure it sticks.
The learn → practice flow
Step 1: Lesson
Read-aloud story introduces the concept with guided examples and a short quiz
Step 2: Practice
Adaptive engine gives practice at exactly the right difficulty for your child
Step 3: Spaced review
Skill comes back days and weeks later to verify mastery over time
Mastery-based progression
Every skill in Lumastery is mapped to its prerequisites. Multiplication requires addition fluency. Fractions require an understanding of division. The system enforces these dependencies automatically.
Your child can't skip ahead without demonstrating they've mastered the foundation. And when they do master a skill, the next step is already queued — no planning required on your part.
One correct answer is not mastery. Consistent accuracy across multiple sessions is.
Prerequisite chain
Science, K through 8th grade
Science modules cover physical science, life science, and earth and space science across every grade. Each interactive lesson teaches the concept on screen with a short quiz. There is no kitchen-table experiment packet and no lab credit.
Science works differently from math and reading — it's structured by topic and grade rather than driven by the adaptive engine. Your child explores concepts like forces and motion, living things, weather, atoms, and ecosystems through guided on-screen lessons: observing, questioning, and testing ideas in the lesson itself — not a take-home lab.
Science strands
Physical Science
Forces, matter, energy, waves, atoms
Life Science
Living things, body systems, ecosystems, heredity
Earth & Space
Weather, rocks, water cycle, solar system
On-screen lessons only — no experiment guides
117 on-screen K–8 lessons. High-school lecture units are a separate track for age 13+.
Parent controls
Choose how math is taught (a Family option), track progress across math, reading, and science, and — on Family — get weekly emailed reports. The free plan is one child and one daily session. You focus on being present — not on lesson prep.
Toggle between traditional (facts, procedures, fluency) and conceptual (number bonds, place value reasoning) for each child. Change it any time.
See every child's progress in one place. Skills mastered, skills in progress, and what the system is adjusting next. No spreadsheets.
Every week: skills practiced, skills mastered, accuracy trends, and what the system is focusing on next. Clarity, not data overload.
Visual teaching
Every concept is taught with clear, visual explanations designed for how children actually learn. Browse real examples from Pre-K through 8th grade.
How many stars?
Counting Objects
Tap to learn more
Learn to Read: Letter Sounds
Tap to learn more
7 out of 10
Number Sense
Tap to learn more
3 + 2 = 5
Addition
Tap to learn more
8 − 3 = 5
Subtraction
Tap to learn more
Hundreds, tens, and ones
Place Value
Tap to learn more
Carry when a column adds to 10 or more
Column addition with carrying
Regrouping
Tap to learn more
3 × 4 = 12
3 rows of 4
Multiplication
Tap to learn more
The quick fox jumped over the lazy dog.
Grammar: Parts of Speech
Tap to learn more
3/4
Three fourths
Fractions
Tap to learn more
Measuring rectangles
Area & Perimeter
Tap to learn more
Plotting points
Coordinate Plane
Tap to learn more
3 × 2 × 4 = 24 cubic units
3D measurement
Volume
Tap to learn more
Reading Comprehension
Tap to learn more
55° + 35° = 90°, complementary!
Complementary angles
Angle Relationships
Tap to learn more
Circumference & area
Circles
Tap to learn more
3² + 4² = 9 + 16 = 25 = 5²
Right triangles
Pythagorean Theorem
Tap to learn more
Pre-K·Counting Objects·1 of 17
What you see as a parent
All of your children in one place. See their current skill levels, recent progress, and what's being worked on today. No switching between accounts or apps.
Working on Multiplication · Times Tables & Fluency
Working on Addition · Sums to 20
Working on Counting · Counting to 20
Skills practiced, skills mastered, accuracy patterns, and what the system is adjusting next. Emailed on Family. Free accounts see the same progress on the dashboard. Family is not for sale yet.
5
Sessions
47
Exercises
91%
Accuracy
5
Day Streak
Working at 2nd grade level
Typical for age: 1st grade
Working at 1st grade level
Typical for age: 1st grade
91% Math
30 exercises
88% Reading
14 exercises
2 lessons
Science
Emma had a strong week across the board. Her math accuracy on timed addition jumped from 74% to 91%, and she's moved into two-digit subtraction with regrouping. In reading, short vowels are solid and she's starting to blend digraphs. Science: she completed both weather lessons.
Grab a handful of coins and have Emma sort and count the total. Start with pennies and nickels, then add dimes.
When: Saturday morning
Read a short book together and pause on words with "sh" or "ch" — have Emma sound them out.
When: Bedtime, Tues & Thurs
Put 10 crackers on a plate. Eat some, then figure out how many are left. Write the equation together.
When: Snack time
Help with Subtraction Within 100
Teaching subtraction with regrouping
6 min read
Short Vowel Sounds — what's next
From short vowels to digraphs: the next step
4 min read
68 min of focused practice this week.
Sign up, add your child, and sit with them for the first lesson. You'll see exactly where they are and what they're ready for. Free: one child, one daily session. No credit card required.
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