Learn with an AI teacher, at your own pace

A full online school for grades 3 through 12 — English, math, science, history, languages, art, health, and computer science — matched to what your state requires, in all 50 states. It is also a catch-up school: over summer and holiday breaks, a short pre-test finds exactly what slipped, and you relearn only that.

Grades 3–12
States All 50
Core subjects 4 + 4 electives
Skills Test Relearn only what's missing

Start below: pick your grade from the index, and that grade's own page opens — its subjects, its lessons, its pre-tests. Lessons are short, in plain words, with big text — read a step, try one question, and move on when you get it.

Illustration of students learning online with laptops and notebooks while their teacher teaches fractions and planets on a big screen

★ Start here — take the Skills Test

Three quick questions per subject. The test finds what you already know, so you relearn only what is missing. When you finish, you will see only the list of skills to relearn — no score is shown.

Pick your grade

You're only in one grade at a time, so the levels stay folded up — only one level is open at a time. Tap a level to open it and the others shut on their own, then tap your grade to open its page.

What should I work on?

What to relearn

Meet your teachers

Plurp teaches every lesson — one friendly voice in every subject, the way the most-watched education channels use a single explainer students come back to. Or pick one favorite below and that teacher takes over all your lessons instead, for your whole visit. Your favorite stays picked when you change grade, state, or subject. You can change your favorite any time — just tap a different teacher below, even in the middle of a lesson.

Design your avatar — that's you!

Make a cartoon avatar that looks like you: your skin tone, your hair, your eyes, your style. When you're happy with it, tap Save my avatar. Your saved avatar then stands next to your teacher in every lesson — and it's ready for the future, when students can talk and work with classmates here: classmates will see this avatar and your avatar name, never a photo of you. Talking with other students is not open yet — your avatar is the first step, ready and waiting.

Your avatar

Skin tone
Hair style
Hair color
Eye color
Glasses
Clothes
Clothes color
Accessory
Background

Changed your mind later? Just design it again and tap Save — your new avatar replaces the old one everywhere, including in lessons. Your avatar is saved for this visit.

Your subjects

This is your grade's own page. Start with the Skills Test — tap the big teal button on any subject below, or pick a subject here. Three quick questions per subject, and the result is a list of only what to relearn — no score. Then tap Start lesson and your AI teacher walks you through it, one small step at a time.

★ Skills Test — pick a subject

Tap a subject and its test opens right away.

Jump to another gradeGrades 3–12
Lessons finished this visit: 0 of 8

Progress counts for this visit only — it resets when you close the page.

Catch up over a break — summer, holidays, any time

This school is a great way for kids to catch up during holiday breaks and summer. A break is short, so the work has to be smart: test first, learn only what slipped, in sittings of about 20–30 minutes. Nobody redoes a whole grade here — the pre-test checks off everything your child already knows, and the catch-up plan is built from the gaps that are actually left.

Three ways to use a break

1 · Finish the Line

Last term ended with some topics unfinished. Pick the grade just finished, take the pre-test in the shaky subject, and finish only the topics it flags. When the list is empty, the term is truly done.

2 · Get Ready for the Next Grade

Once the gaps are repaired, open the next grade's page from the Home index and try its pre-tests. Every topic already known is a head start; the few that aren't are exactly what next year will assume — learn those before the first day back.

3 · Pick Your Own Adventure

Keeping skills warm counts too. Choose any subject you enjoy and finish 2 topics a week, about 30 minutes a week — small, steady, and done. Breaks are for resting as well; this path keeps the rust off without turning the holiday into school.

Build a catch-up plan

Pick the grade your student just finished and the subject that feels shaky. Step 1: take that subject's Skills Test (the big teal button at the top of every page also opens it). Step 2: come back here and tap “See my catch-up plan” — the plan lists only the skills to relearn, one per day. No score is shown anywhere.

Your break so far

For parents: my child is behind — what can we do?

If your student is behind, you are not alone, and it is rarely as bad as it feels. “Behind” almost never means everything is missing. It usually means a handful of pieces are missing — and everything built on top of those pieces wobbles. Find the missing pieces, repair just those, and the rest often stands back up on its own. That is exactly what this school is built to do.

My child is behind. What can we do?

Start by finding out precisely where the gaps are — not “bad at math,” but which topics. That is what the pre-test on each grade page is for: three short questions per subject, one per key skill, and every skill comes back marked already known or still to learn. Then work the “still to learn” list, one topic at a time, in short daily sittings. Behind is a list, and lists can be finished. Most families are surprised how short the real list is once the topics a child already knows are checked off instead of re-taught.

What can my child do to catch up?

Three steps, in order. Step 1 — Pre-test: on the Home index, open the grade your child just finished (or is in), and take the pre-test in each shaky subject. It takes a few minutes per subject and it can only help — a wrong answer costs nothing, it just puts that topic on the learning list. Step 2 — Learn only what's missing: work the flagged topics with the AI-teacher lessons, about 20–30 focused minutes a day. Step 3 — Watch the gaps close: as each topic's lesson check question is answered, that topic leaves the list. When a subject's list is empty, your child has caught up in that subject — then, if time remains in the break, try the next grade's pre-tests for a head start.

Does my child have to redo the whole grade?

No — and please don't make them. Re-teaching a child material they already know is the fastest way to convince them they're “bad at school”: it's boring, it feels like punishment, and it spends the break's limited days on the wrong topics. Schools that run catch-up well repeat only what wasn't passed or learned the first time. The pre-test exists precisely so the known two-thirds of a grade is checked off in minutes, and the break is spent on the third that's actually missing.

My student fell behind in math

Math is the subject where one missing piece does the most damage, because math builds like a tower: fractions hold up ratios, ratios hold up algebra. A student who missed fractions in grade 5 can look “lost” in grade 7 even though exactly one link is broken. The fix is to find the link, not restart the tower. Take the math pre-test on the grade page — and if nearly everything is flagged, step down one grade and pre-test there too. Repair the lowest missing link first; the topics above it often start making sense within days.

My student fell behind in reading and writing

Reading gaps hide inside every other subject — a child who reads slowly struggles in science and history too, because the textbook is the barrier. The repair is unglamorous and it works: a little reading every single day (short is fine — finishing matters more than length), plus small, frequent writing instead of rare big assignments. Use the English pre-test to find whether the gap is understanding what's read, building an argument, or vocabulary — each has a different fix, and the lessons here target the one your child actually has.

How much time a day does catch-up take?

Less than most parents fear. 20–30 focused minutes a day, most days, beats a three-hour Saturday marathon — memory consolidates between sittings, and a child who dreads the sessions learns at half speed. One topic a day is a good rhythm: over a four-week break that's roughly twenty topics, which is more than most students' entire gap list. Keep the same time each day, keep it short enough to end on a success, and let the rest of the break be a break.

Can this work over summer or a holiday break?

Yes — this is the use the school was designed around. Breaks are when catch-up actually fits: no homework competing, no new material arriving daily, and a natural deadline (the first day back) that everyone understands. Run the pre-tests in the first few days of the break, work one topic a day through the middle, and spend the last week on the “Get Ready” path — the next grade's pre-tests — so your child walks back in having already seen what the new year assumes they know.

What if my child is behind in more than one subject?

Normal — gaps travel together, often because one root cause (a rough term, an illness, a move, a teacher change) hit everything at once. Don't split each day four ways. Pick one subject at a time, or alternate days (math Monday/Wednesday, English Tuesday/Thursday). Start with reading if reading is one of the gaps — it unlocks the others. And keep the total day short: two 20-minute sittings on different subjects is plenty; more than that usually buys resistance, not learning.

How will I know it's working?

Watch the lists, not a grade book. Every topic in every subject sits in one of three states you can see on the grade page: already known (checked off by the pre-test), still to learn (flagged by the pre-test), or lesson finished (learned and checked here). Catch-up is working when the “still to learn” list visibly shrinks week to week — the “Your break so far” panel above keeps that relearn list. If a topic stays stuck after two honest attempts, that's information too: that one may need a human tutor's eyes, and now you know exactly which topic to show them.

Behind is a starting point, not a verdict. Every student in this school starts from a pre-test, not a judgment — what they know is honored and skipped, what they don't is taught one small step at a time. One honest note, said gently: these are real lessons matched to your state's requirements, and they teach and give practice — by themselves they do not award course credit or a diploma. If your child needs official credit recovery, pair this with their school or district's program, and bring the topic list — it will save everyone time.

What your state requires

High-school graduation rules are set by each state — how many credits, and in which subjects. Here is your state first, then every state so you can compare. Districts can require more than the state minimum, so always confirm with your state Department of Education and your local district before you plan a diploma.

Compare all 50 states

Credit totals use the usual “one credit = one full-year course” count. A few states count differently — Indiana counts by semester (40 semester credits), New Jersey by points (120), and Nebraska by hours (200) — those are shown converted, with the state’s own count in the detail view. States marked “set locally” have no single statewide credit total; their districts set it.

The road to a diploma (grades 9–12)

Almost every state builds a diploma from the same four building blocks, plus electives. This is the shape of it — your state’s exact numbers are in the panel above.

  • English — 4 years. Reading, writing, and speaking every year of high school, through English 12 / senior composition.
  • Math — 3 to 4 years. Algebra I, Geometry, and Algebra II in most states, then Pre-Calculus, Statistics, or a career-math course.
  • Science — 3 years. Usually Biology plus Chemistry or Physics, and one more lab science such as Earth Science.
  • Social studies — 3 to 4 years. U.S. History, World History, Government / Civics, and Economics in most states.
  • Health & PE. Most states require at least a semester of health and 1–2 credits of physical education.
  • World language, art, or career courses. Many diplomas require 1–2 years in one of these — and colleges usually want 2 years of the same language.
  • Electives. The rest of your credits are yours to choose: computer science, music, business, agriculture, and more.
  • Tests & extras. Some states add a civics test, CPR, financial literacy, or a state assessment. Your state panel notes the big ones.

A school week that fits a real life

Online school does not need a bell. This is one gentle pattern — about 4 to 5 hours a day, with breaks. Move subjects around to fit your family, work, or health.

Monday

  • Math lesson + practice
  • English reading
  • Science lesson
  • Free reading — 20 min

Tuesday

  • Math lesson + practice
  • English writing
  • History lesson
  • Elective of your choice

Wednesday

  • Math review & quiz
  • Science lab / project
  • History reading
  • PE / walk / sport

Thursday

  • Math lesson + practice
  • English lesson
  • Science review
  • Elective of your choice

Friday

  • Weekly check-up quizzes
  • Finish one project
  • History lesson
  • Plan next week — 10 min

For parents & families

How the AI teacher works

  • One step at a time. Every lesson is broken into small steps in plain words — no walls of text.
  • Practice with kind feedback. Get a question wrong and the teacher explains why and lets you try again — no grades on practice.
  • The Plurp Formula. Every lesson opens with one question and a hook, names the trap answer before teaching, makes the student predict before the reveal, teaches in tiny steps drawn on the whiteboard, fades from a worked example to a half-finished one to solo practice, and closes with a three-line recap and the next lesson's question. The evidence panel below shows where the formula came from — and what it cannot claim.
  • Your pace, always. Repeat a lesson as many times as you need. There is no falling behind a class.
  • Pre-tests first. Every subject opens with a short pre-test that checks off what your child already knows — nobody relearns what they already know. The Catch Up tab turns those results into a day-by-day plan for summer and holiday breaks.
  • A human still matters. This school supports a parent, guardian, or tutor — it does not replace one. Keep an adult in the loop, especially for younger students.

Online school vs. homeschool — know your state’s rules

Every state treats these differently, and the difference matters legally:

  • Enrolled online school: the school keeps records, assigns credit, and awards the diploma.
  • Homeschool: the parent is the school. Most states require a notice of intent, certain subjects, and records or testing — the exact rules are your state’s, in the panel above.
  • This page is a learning guide and practice school. It teaches to state standards, but by itself it does not enroll you, award credit, or issue a diploma. If you need an official diploma, pair it with an accredited program or your state’s homeschool process.

Why every lesson follows the Plurp Formula — the evidence

Every lesson here is built the same way: one question as the title, a hook on the first screen, the trap answer named before the method, a prediction before the reveal, tiny steps drawn on the whiteboard, a worked example that fades to a half-finished one and then solo practice, a recap of three lines or fewer, and the next lesson's question as the tease. That recipe was distilled on 2026-11-02 from the most-watched education channels on YouTube and the learning research underneath them. This panel is the evidence — with its limits printed, not hidden.

The channels — scale, as reported by third-party trackers (checked 2026-11-02)

Read this first: subscriber and view counts below come from third-party tracker sites, each named next to its figures. Trackers disagree with each other, and counts move daily — treat every number here as a scale indicator (“tens of millions of subscribers, billions of views”), not an audited figure.

  • ChuChu TV — 98.2M subscribers; ranked #1 in FindYourKOL's Education index (FindYourKOL, updated 2026-11-02 — that ranking is as of the check date). Songs and repetition for the youngest learners.
  • Mark Rober — 72.6M subscribers and 15.4B views (AIR Media-Tech). A second tracker snapshot dated 2026-10-28 (kabo.sh) lists 84.9M subscribers and 19.75B views, with his “World's Largest Jello Pool — Can You Swim in Jello?” video at ~224M views. Same channel, same week, two different counts — that disagreement is exactly why these numbers are scale indicators only.
  • Vsauce — 24.6M subscribers, 6.4B views (AIR Media-Tech). Built on question titles: “What is…?”
  • Kurzgesagt – In a Nutshell — ~24M subscribers (2026 case study, datafield.dev); the studio's own process account puts ~1,200 hours of work into a single video, with scripts checked by field experts and a public sources document per video.
  • TED-Ed — 23M subscribers (FameLifter, Nov 2026). Every lesson runs Watch → Think → Dig Deeper → Discuss.
  • Veritasium — 21.4M subscribers (FameLifter, Nov 2026). CreatorSpin listed 18.1M subscribers and 3.3B views as of June 2025 — an older snapshot, printed here so the movement (and the disagreement between sources) stays visible.
  • CrashCourse — 16.9M subscribers, 2.2B views (AIR Media-Tech). Tightly scripted ~10–12 minute episodes with hand-drawn “Thought Bubble” segments.
  • SmarterEveryDay — 11M+ subscribers (InfluencerFee roundup — a roundup figure, not a dedicated tracker page).
  • AsapSCIENCE — 10M+ subscribers (InfluencerFee roundup). Hand-drawn whiteboard explainers, one question per video.
  • Khan Academy — 9.5M subscribers, 2.26B views, 9,508 videos (vidIQ, updated 2026-11-01). One concept at a time, drawn live on a board, practice right after.
  • Jack Hartmann Kids Music — 5M+ subscribers and 2.8B+ total views per a biography site — a weaker source, so treat those two figures as approximate. His own Patreon “About” confirms 1,200+ songs and that his Brain Breaks album won a Parents' Choice Approved Award; the biography site credits 1,500+ songs written. The song counts differ by source, so both are printed rather than merged.
  • Numberphile — 4.79M subscribers, 742M views (Wikipedia, updated 2026-11-01). Experts explaining one idea while drawing on big brown paper.
  • SciShow Kids — ~1.71M subscribers, 614 videos (FamilyTube guide, Oct 2026 — a guide figure, not an official channel count). Episodes open from a question a real child asked, with a puppet sidekick voicing the child's-eye questions.

The research — what the winners do, measured

  • Short, single-concept lessons. Guo, Kim & Rubin (ACM Learning @ Scale, 2014) analyzed 6.9 million video-watching sessions across four edX courses: median engagement was at most 6 minutes regardless of video length, and students often made it less than halfway through videos over 9 minutes. Hence: one idea per lesson, in small steps the student paces.
  • Draw it live, don't show finished slides. In the same edX research, Khan-style tablet-drawing tutorials held roughly 1.5–2× the normalized engagement of PowerPoint-slide and screencast tutorials, and produced more follow-on problem attempts — 40% vs 31%. A separate 2016 experiment (Turkay & Mouton, 568 learners) also found a learning and enjoyment benefit for whiteboard animation over slides, filmed lecture, audio, and text.
  • Name the wrong idea first. Derek Muller (Veritasium) did his PhD on this — Designing Effective Multimedia for Physics Education (University of Sydney, 2008). Students who watched a clear, misconception-free explanation often rated it highly yet kept their wrong answers; students who saw the misconception stated and refuted invested more mental effort and nearly doubled their test scores. Hence every Plurp lesson names its trap before teaching.
  • Worked example first, then fade. A 2023 meta-analysis of 43 articles found the worked-example effect at g ≈ 0.48 in favor of beginners studying worked solutions. Hence the ramp in every lesson: Plurp does one → we do one (half-finished) → you do one.
  • End by retrieving, not re-reading. Retrieval-practice research (Roediger & Karpicke, 2006) shows that producing an answer strengthens memory more than re-studying — the reason each lesson's recap includes a question the student answers from memory before the lesson closes.
  • The first seconds decide. Retention guides built on YouTube Analytics data report typical losses of 20–40% of viewers in the first 30 seconds, and name the fix: state the payoff within the first 15 seconds — no intro, no greeting. Hence every Plurp lesson opens mid-action, on the first screen. (This is channel-level guidance — see the open questions below.)

What we don't know yet — open questions, stated plainly

  • No classroom trial of the Plurp Formula itself. The formula is assembled from video-engagement data and learning-science studies. No K-12 classroom randomized trial has tested this exact recipe, as a package, on school students — it is evidence-informed, not proven as a whole.
  • No per-video retention data. The “first 15 seconds” rule comes from channel-level retention guidance and analytics summaries, not from published per-video retention curves for the individual videos named above.
  • Some counts rest on single, weaker sources. There are no verified counts for SciShow Kids beyond the FamilyTube guide figure, none for SmarterEveryDay or AsapSCIENCE beyond InfluencerFee roundups, and none for Jack Hartmann beyond a biography site and his own Patreon page.
  • Tracker disagreement is printed, not resolved. Where trackers disagree (Mark Rober: 72.6M vs 84.9M subscribers in the same week), both figures appear above. Counts also move daily, so every figure here is a snapshot of its check date, 2026-11-02.

Common questions

What subjects does every student take?

The four core subjects in every state and every grade 3–12 are English Language Arts, Mathematics, Science, and Social Studies / History. On top of those, most states expect health and PE, art or music, a world language in high school, and growing computer-science options. All eight are included here.

Do all states teach the same thing?

Mostly, with local flavor. Most states base English and math on similar national frameworks, science on the Next Generation Science Standards or a state version of them, and each state adds its own history — your state’s history is usually taught in 4th–5th grade and again in middle or high school. That is why the state picker matters: topics here follow the common national pattern, and your state panel shows where your state is specific.

Can a 3rd grader and a 12th grader both use this?

Yes — that is the point of the grade index. Grade 3 gets its own page with bigger text, shorter readings, and hands-on math like multiplication and simple fractions. By grade 12 the same subjects are senior-level: research writing, statistics or pre-calculus, physics or an elective science, and government and economics. Each grade page starts with pre-tests, so both students skip whatever they already know.

What if we move to another state?

Change the state picker. Core subjects transfer well — Algebra I is Algebra I everywhere — but credit totals and a few required courses (state history, health, financial literacy) differ. The compare list in section 3 shows both states side by side.