Grade 10 math, unit by unit

Is there a Christian homeschool geometry curriculum with real proofs?

Free for 30 days. No card.

Every course in every grade, for every child in the family. Lessons pause when the free days end unless you choose to subscribe.

Start 30 days free

Yes. Geometry: Structure, Proof, and Measurement is a grade 10 course of eight units and 57+ hours in which a student learns to prove things about shapes instead of just measuring them. It follows the Common Core State Standards.

The eight units

Transformations and the Definition of Congruence and Similarity. Triangle Congruence and the Logic of Proof. Similarity and Proportional Reasoning in Triangles. Coordinate Geometry: Proof and Measurement on the Plane. Right Triangle Trigonometry. Circles: Angles, Arcs, Segments, and Equations. Three-Dimensional Measurement. Geometric Probability and Modeling with Measurement.

Proof from the start

A child works out what makes two shapes the same, by showing a slide, flip, turn or resize connects them, then builds up to formal proofs about triangles and reuses that logic for circles, coordinates and solids.

Trig and probability as old ideas

Trigonometry and geometric probability show up as the same ideas from earlier in the year under new names.

The skill at the end

By June a student can tell the difference between this looks true and this is proven.

What this is not

It is one course among many. You decide which to take, which to hold back and how many to do in a day.
It cannot promise any college will accept a homeschool transcript. It prints one of what was taught and mastered, and your family issues it.
A student who is behind is not stuck. The course is mastery paced and slows down when a child struggles.

Start 30 days free

Geometry and every other course. No card.

Look inside all 84 courses firstEvery unit, every skill, every objective. No account, no card.

or start now

What grade(s)? (so their first lesson is ready)

Before your child starts: what we collect and why

We collect only what it takes to teach your child: the first name and sign-in you choose, their answers and progress, and their chat with Clara (written by Anthropic's AI, read aloud by OpenAI). Nobody trains AI on it or sells it, and you can see or delete it any time. You create your child's account yourself. Ticking the box below is how you, as the parent, give consent.

Read what we collect and why

Your consent is needed before we collect anything from your child, and we collect nothing without it. You create your child's account yourself; they never sign up alone.

What we collect from your child: the first name and sign-in you choose, their answers, time on lessons and progress, and their chat with Clara. Used to run the lessons, build their transcript and show you how they are doing.
Who else handles it: Anthropic writes Clara's replies from the chat, the lesson and your child's first name. OpenAI turns lesson text and Clara's replies into the read-aloud voice. Spoken answers are turned into text on our own server and never sent anywhere. Our email provider sends you reports. Nobody sells your child's data or uses it for anything else.
Your rights: see everything collected from your child, have it deleted, or stop further collection at any time, from your account or by emailing our support address. If you refuse the sharing above, Clara cannot teach, so the service cannot run. Chats are deleted after 30 days.
Safety: if your child writes something suggesting they may be hurt or in danger, we email you and the owner of Letters & Devotion the same day.

Ticking the box below is how you, as the parent, give that consent. Full details, including how long we keep each thing: Privacy Policy (version 2026-10-09).

I am this child's parent or guardian, and I agree to the above.

Free for 30 days. No card. When the free days end, lessons pause unless you choose to subscribe, $29 a month for every child in the family. Nothing is ever charged without a card.

By continuing you agree to the Terms and Privacy Policy.

Rather see it first? Try a full lesson free

Questions parents ask

Does it teach two-column proofs?

It teaches the logic of proof, starting with triangle congruence and carrying it through circles, coordinates and three-dimensional shapes. Every unit is published so you can read exactly how.

Does it count toward a high school transcript?

Hours log themselves and a transcript of what was taught and mastered prints in one click. There is also a free transcript maker at /homeschool-transcript that needs no account.

What does it cost?

$29 a month or $290 a year for every child. The first 30 days are free with no card.

Also written up