Free classroom tools

Built for the
classroom.
Not the app store.

Every tool here works in a browser, requires no login, costs nothing, and was built to solve a real problem in a real classroom. No SSO approvals. No district IT tickets. No subscription.

See the tools
Tools
Math · Grades 3–5
DrillBird

Math fact fluency practice built around spaced repetition. Students pick a fact set, drill until every fact is clean, and get a completion screen built for a quick teacher check-in. No accounts. No tracking. Just practice.

Open DrillBird
Writing · Grades 3–5
CER Writer

A structured scaffold for Claim, Evidence, Reasoning opinion writing. Students build their argument step by step with sentence frames that fade as confidence grows. Designed for the projector or individual use.

Open CER Writer
Writing · Grades 3–5
Sentence Roulette

A mentor sentence tool for the smartboard. Spin to reveal a model sentence organized by character trait — a fast, low-prep way to put strong writing in front of students every day. Over 100 mentor sentences built in.

Open Sentence Roulette
Math · Grade 4
Pepper Quest

A four-level math word problem game targeting 4.OA.3 multistep problems. Students unlock levels by completing quests — single-step through remainder interpretation with written explanation. Features a 16-bit pepper mascot that cools down as you progress.

Open Pepper Quest
Writing · Grades 3–5
Convince Me That

Generates a print-ready 6-page student argument packet on demand. Enter a debatable statement, a text or unit title, a grade level, and a subject — download a complete PDF with role cards, a structured discussion protocol, a C-E-R-C writing frame, rubric, and reflection prompt. Ready to print and hand out.

Open Convince Me That
Differentiation · Grades 3–8
Extend

Drop in a screenshot of any textbook page, enter the standard, grade, and content anchor, and get a print-ready DOK 2–4 extension ladder students self-select into. DOK 2 uses what the class already read. DOK 3 pushes into an adjacent domain. DOK 4 requires synthesis across domains — a shallow response is visibly shallow. Output is a clean two-sided document with DOK badges and library resource callouts. Powered by Claude.

Open Extend
Feedback · Grades K–8
Notation

Select a standard, a performance level, and a tone. Get targeted, standard-specific written feedback — calibrated to where the student actually is, ready to copy into a grade book, report card comment, or conference note. No API. No generation. Just the right words, already written.

Open Notation
Discussion · Grades 3–8
Evidence Talk

Paste any passage, select the text type and standard focus, and get nine discussion prompts — three at each DOK level — grounded in the actual text. Every question is calibrated to the Hess Cognitive Rigor Matrix. Ready to project or print. Powered by Claude.

Open Evidence Talk
Special Education · Grades K–8
Accommodation Decoder

Paste accommodation language exactly as written in an IEP or 504. Get a plain-language explanation of what it actually means in your classroom — plus the specific red flags to avoid. One accommodation at a time or a full section at once. Powered by Claude.

Open Accommodation Decoder
Communication · All grades
Dispatch

Paste a draft parent email or describe a situation. Get two versions back — one direct and warm, one collaborative and inviting — plus a sensitivity review that flags anything that could land wrong before you hit send. Jargon removed. Tone softened. Powered by Claude.

Open Dispatch
Vocabulary · Grade 3
Word Wise

A structured vocabulary program with 15 lessons and 225 academic words. Each word moves through four stages — definition, context sentence, fill-in-the-blank, and meaning selection — before it's marked mastered. Built as a free alternative to commercial vocabulary curricula. No login, no cost, works offline.

Open Word Wise
Classroom Management · Teacher Tool
ClassGraph

Map your classroom's social dynamics as a relationship graph. Draw positive and negative connections between students, assign academic tiers, and tag behavioral traits — then generate AI-optimized seating charts and groupings. Balances social compatibility and academic heterogeneity simultaneously. FERPA-safe: student numbers only, no names, nothing leaves the browser except an anonymized API call. Powered by Claude.

Open ClassGraph
Philosophy
The tools teachers actually need aren't the ones districts approve.

Most classroom tool problems aren't pedagogical — they're logistical. The app requires SSO. The district hasn't approved it. The free tier ran out. The login takes five minutes of class time. So teachers give up, or make do, or build their own.

These tools exist because the gap between what's available and what students need is real. Strong mentor writing and frequent low-stakes practice matter. They shouldn't require a purchase order.

01
No login required Students open a URL and start working. Nothing else.
02
No cost, ever Free to use, free to share, no premium tier.
03
Built in a real classroom Every tool was made to solve a specific problem with specific students.
04
Works anywhere Chromebook, laptop, tablet. Any browser, any school.
the teacher behind it Mr. K

I'm an elementary school teacher currently teaching fourth grade at a Common Core school outside the United States. I teach all four core domains — math, science, social studies, and language arts — to the same group of kids every day.

I started building these tools out of frustration. The apps districts approve rarely match what students actually need, and the ones that do are usually locked behind SSO systems or paywalls that make them impossible to access. So I built my own.

Everything here was made to be used in my classroom first. If it works there, it's worth sharing. More tools are in progress.