What it costs
A free floor for every student. Flat for schools. Lower at district scale.
Every student gets a free floor — all K–12 practice, all cosmetics, and the free math game — with zero in-app purchases in the school product. For schools, it's free through June 30, 2027; the rates below apply after that. The extra math games and the Grow adaptive assessment come with a School or District license. Parents on home accounts can unlock the same depth for their child with Family Plus ($59.99/year or $7.99/month, flat for every child on the account); the child never sees a subscribe button, a price, or a purchase link.
Free
$0always
Every student, every classroom
Get started- ✓All math + reading practice, K-12
- ✓Adaptive difficulty across 2,300+ skill tiers
- ✓The free math game (Fact Jump)
- ✓All cosmetics, skins, and pets
- ✓Progress tracking for students
- ✓For teachers: Class Data (scores, each student’s answers, growth over time, PDF/CSV reports), Class Challenges, and any state’s standards
- ✓Interactive tools + manipulatives
- ✓Runs in any modern web browser — no install required
- ✓No in-app purchases in the school product, no ads
Recommended
School
$20per student / year
Any school size — free through June 30, 2027
K-8 or K-12 building
Start free through June 2027Prefer a formal proposal first? Request a quote.
- ✓Everything in Free, plus:
- ✓The extra math games, as each one opens
- ✓The library — real books by real authors, with chapter questions — open for grades K–2, 6–8 and 9–12 (grades 3–5 as that shelf fills)
- ✓280+ lesson plans synced to student needs
- ✓Grow adaptive assessment (3 windows/yr)
- ✓Test creation + custom tests
- ✓Small groups built from the mistake patterns behind wrong answers
- ✓Needs-attention alerts + one-tap small-group lessons + extension supports
- ✓Google and Apple sign-in, printed badge cards and class codes for students without email, and OneRoster CSV rostering
- ✓Onboarding webinar + email support
District
$15per student / year
Custom quote at 25,000+
Multi-school district
Contact SalesA single school under 1,000 students? Start free online through June 2027.
- ✓Everything in School, plus:
- ✓District-wide reporting across schools
- ✓Multi-state standards alignment (11 frameworks)
- ✓District-specific DPA + compliance
- ✓Admin onboarding + implementation calls
No in-app purchases in the school product: When a student signs in via a school roster, the app shows zero subscribe buttons, zero prices, zero purchase links, and zero ads. The license unlocks the extra math games and the Grow assessment for the whole roster, so a licensed student simply has full access — the school or district is the buyer, and the student is never marketed to. Without a license, the math games beyond the free one show on the games shelf with a small lock, and tapping one only says the game isn’t open yet. (The separate Family Plus consumer subscription described below is only visible to parents on personal/home accounts.)
For parents on personal accounts: Every child gets the free floor — all practice, all cosmetics, and the free math game. Family Plus is a separate consumer subscription — $59.99/year or $7.99/month — that unlocks the extra math games and the grade-level adaptive assessment — plus the assessment readout and skill-by-skill progress detail for the parent. It is a flat household rate, not a per-child one: one subscription covers every child on the parent’s account.Stripe-administered, starts with a 14-day free trial with no card up front, cancel anytime. The subscribe button is a quiet row in Settings on a personal (home) account so a parent can find it; children never see it on a school-rostered account.
For individual teachers: Any teacher can create a class and use the free floor with their students at no cost. Teacher Plus is a separate consumer subscription at $99.99/year or $12.99/month — a flat rate for the teacher, not a per-student one — covering a roster of up to 40 students. It unlocks the extra math games and the Grow grade-level assessment for the teacher’s rostered students — and gives the teacher test & Grow assignment, lessons, and the mistake patterns and small groups behind the class’s wrong answers. Class Data and the standards crosswalk (choose any state’s standards) are free for every teacher. Grow reports a grade-level approximation — a placement on a grade-equivalent scale to guide instruction; it is not a validated, normed, or diagnostic test. The institutional layer — district roll-up, SIS rostering, and the central admin portal — stays with a School or District license. Stripe-administered, starts with a 14-day free trial with no card up front, cancel anytime.
Procurement: We accept purchase orders with net-30 invoicing and ACH. No payment card data is collected, processed, or stored — billing is arranged via direct invoice. Paying with federal funds? See paying for it below.
What the school/district license covers
The free floor — all practice, cosmetics, and the free math game — reaches every student. The per-student license unlocks the depth above it: the extra math games, the Grow assessment, and the features that require school-level infrastructure. A library of real books by real authors, with chapter questions that feed the teacher's view, is open for grades K–2, 6–8 and 9–12, with grades 3–5 opening as that shelf fills, and its full shelf is part of the license.
The extra math games
Every math game beyond the free one. Fact Jump, the free math game, is playable for every student today; the rest of the set is in development and opens game by game. Each game practices a math skill inside play, scaled to the student’s grade.
Teacher-led lessons
280+ 5-phase lesson plans that automatically sync with student needs. Live monitoring shows who's stuck, auto-remediation steps students down (concrete → visual → symbolic), and exit tickets score themselves.
Grow assessment
Research-informed adaptive placement across 3 windows per year — a Rasch-based adaptive engine that routes on item difficulty toward the student’s level, reaching above and below grade, in the same computer-adaptive methodology family as the major commercial diagnostics (an architecture statement, not a claim of their validation maturity). Two pre-registered analysis plans are publicly deposited (a concurrent-validity study against state assessment results and commercial diagnostics, plus a practice-engagement-and-growth study); each locks formally after academic methodologist review, before any pilot data flows. Empirical calibration and norming follow once cumulative pilot enrollment supports them. Testing runs a fixed, predictable item budget per topic area, flags students who are rushing, and tracks growth over time — designed to finish in about 20-25 minutes.
Teacher tools
Test creation and assignment, custom tests, and small groups built from the mistake patterns behind wrong answers. Class Data (scores, each student’s answers, growth over time) and Class Challenges are free for every teacher.
Compliance + rostering
District-signed DPAs, FERPA & COPPA alignment. Google and Apple sign-in, printed badge cards and class codes for students without email, and OneRoster CSV rostering.
Groupings → small groups
With a school license, the Groupings view on the Class Data page groups students by the shared error behind their wrong answers, with a lesson to assign to each group when one is ready.
Platform overview
Full curriculum
K-12 math + reading — 1,100+ math and 1,100+ reading skill tiers
Adaptive difficulty
Questions scale to each student automatically — no manual leveling needed
Interactive tools
100+ visual question types, plus 20+ manipulatives (rulers, protractors, calculators)
All 50 states + DC
11 frameworks: CCSS + VA, TX, FL, GA, IN, OK, AK, NE, MN, SC
Reading passages
300+ leveled passages across every grade band
Research citations
100+ peer-reviewed studies (ESSA Tier 4)
FERPA + COPPA
Privacy aligned, DPA-ready; a district-signed DPA is executed as part of licensing onboarding
Web-based
Runs in any modern browser at potatoclass.com — no install required
Paying for it
Districts commonly fund per-student software licenses from Title I, Part A; Title IV, Part A; and IDEA Part B (including Early Intervening Services), provided the purchase fits each program's own rules. The evidence basis a grant application asks for is on the research page. Writing a grant application? Email partnerships@growingstandard.com and we will send language you can adapt.
Frequently asked
What is free, and what costs money?
Every student gets a free floor with real substance: all math and reading practice (K-12), all cosmetics and skins, adaptive difficulty, progress tracking, and the free math game. The extra math games and the Grow adaptive assessment come with a School or District license, or — for families on home accounts — with Family Plus. A library of real books by real authors, with chapter questions that feed the teacher's view, is open for grades K–2, 6–8 and 9–12, with grades 3–5 opening as that shelf fills, and its full shelf comes with the same license or plan. The school product still has zero in-app purchases for students: a child on a school-rostered account sees no subscribe buttons, no prices, no purchase links, and no ads. Math games the child's plan does not include yet show on the games shelf with a small lock, and tapping one only says the game isn't open yet.
Is there a separate consumer subscription for parents?
Yes — Family Plus is a consumer subscription for parents on personal/home accounts, at $59.99/year or $7.99/month. It is a flat household rate, not a per-child one: one subscription covers every child on the account. It unlocks the extra math games and the grade-level adaptive assessment for those children, plus the assessment readout and skill-by-skill progress detail. Stripe-administered, starts with a 14-day free trial with no card up front, cancel anytime. The subscribe button is only visible on personal accounts; children on school-rostered accounts never see it, and every child keeps the free floor whether or not a parent subscribes.
Can an individual teacher buy access for their class?
Yes — Teacher Plus is a consumer subscription for a single teacher with a roster of up to 40 students, at $99.99/year or $12.99/month. It is a flat rate for the teacher, not a per-student one: one subscription covers the whole rostered class up to that cap. It unlocks the extra math games and the Grow grade-level assessment for the teacher's rostered students, and gives the teacher test and Grow assignment, lessons, and the mistake patterns and small groups behind the class's wrong answers. Class Data and the standards crosswalk are free for every teacher. Grow reports a grade-level approximation — a placement on a grade-equivalent scale — not a validated, normed, or diagnostic score. Larger rosters and the institutional tools (district roll-up, SIS rostering, admin portal) need a School or District license. Stripe-administered, starts with a 14-day free trial with no card up front, cancel anytime.
How is the per-student rate calculated?
We count enrolled students in the roster, not concurrent users. Schools pay a flat $20/student/year regardless of size. Districts pay $15/student/year at district scale. 25,000+ students receive a custom enterprise quote.
What does implementation look like?
We roster your teachers and students via CSV-free Google/Apple sign-in or a OneRoster CSV import from your SIS, and students without a school email sign in with a printed badge card or a class code. We run a launch PD session and hand off a getting-started guide. Rostering is built for same-day setup, and the whole rollout is designed to take a school or district live in about two weeks.
Do you sign district-specific DPAs?
Yes. We'll sign your state's Student Data Privacy Agreement (SDPC) or a district-specific DPA. We are COPPA and FERPA aligned and do not sell student data.
Is there a pilot option?
Yes. Every school that starts this school year is free through June 30, 2027, with structured success-metric reporting through the pilot term. If you continue, the standard rate applies after that. Contact partnerships@growingstandard.com to set one up.
What payment methods do you accept?
We accept purchase orders with net-30 invoicing and ACH bank transfer. Districts typically pay by PO — send us your purchase order and we'll issue an invoice. No payment card data is collected, processed, or stored by Growing Standard.
How does Growing Standard relate to Potato Class?
Potato Class is the student-facing product. Growing Standard LLC is the company that builds, sells, and supports it for schools and districts.
Get a custom quote
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