High school Geometry, ready to teach

Every high school Geometry lesson, ready to teach.

One membership gives you all 11 units and 92 lessons of high school Geometry: guided notes, a practice activity, a teacher overview and a fully worked answer key for every lesson, as PDFs and editable PowerPoint files.

The Geometry Sidekick member area on a desktop, laptop, two tablets and a phone, with printed geometry pages behind
Six pages from the free lesson: the teacher overview, guided notes, practice and the answer key

Try a full lesson free.

We'll email you Lesson 4.05, Congruent Triangle Proofs, Day 1: the teacher overview, guided notes, a practice activity
and the fully worked answer keys. 13 pages, ready to print. No membership needed.

Where should we send it?

We are teachers, your email is safe with us. Unsubscribe anytime.

Why teachers join

What makes it different.

A lesson page with two congruent triangles, their sides and angle marked, and a two-column proof, with a pencil

Made by a Geometry teacher

Every lesson was made by a Geometry teacher with two decades of classroom experience, for the way Geometry is actually taught in today's classrooms.

A lesson page with a trapezoid, one diagonal and arrows on its two parallel sides, and three worked steps with check marks, with a pencil

Ready to teach

The diagrams are drawn, the practice matches the notes, and every answer is worked out step by step. Almost every practice activity is self-checking, so students can tell they're on the right track without an answer key.

A lesson slide open on a laptop, with a mouse beside it

Everything is editable

Every lesson comes as PDFs and as editable PowerPoint files, so you can change a problem or add your own.

What you get

What's inside every lesson.

Every lesson is built the same way, so once you have taught one, you know your way around all 92.

A guided notes page with a triangle diagram and a pencil

1

Guided Notes

Notes with the diagrams already drawn, so students follow along as you teach instead of drawing.

A practice activity page with a puzzle grid and a pencil

2

Practice Activity

A ready-to-use activity for in-class practice, independent work or homework.

A clipboard with the lesson's goals checked off

3

Teacher Overview

The standards covered, suggestions for how to teach the lesson, and what students need to know before the lesson starts.

An answer key page with a worked circle problem, check marks and a key

4

Answer Key

Every step of the notes and the practice, fully worked out.

A lesson slide open on a laptop, with a mouse beside it

5

Editable PowerPoint Files

Change a problem, add your own, or edit any page to fit your students.

Two activity sheets, a mystery picture and a code-word puzzle, with a pencil

6

Bonus Differentiated Activities

Print and digital activities at several levels of difficulty, in 24 of the 92 lessons.

High school Geometry

All 11 units, from the first lesson to the last.

92 lessons in the order most Geometry classes teach them.

✓   Unit 1 - Intro & Geometric Transformations

✓   Unit 2 - Tools of Geometry

✓   Unit 3 - Parallel and Perpendicular Lines

✓   Unit 4 - Congruent Triangles

✓   Unit 5 - Relationships in Triangles

✓   Unit 6 - Quadrilaterals

✓   Unit 7 - Similarity

✓   Unit 8 - Trigonometry

✓   Unit 9 - Circles

✓   Unit 10 - Volume

✓   Unit 11 - Constructions

Who it's for

Made for Geometry teachers like you.

You want your nights and weekends back.
The planning is already done: open the next lesson, print it and teach.

You're sick of using a textbook written in the 1980s.
This is a whole course of fresh lessons, with new resources added every month.

You want to spend more time teaching and less time prepping. Guided notes, practice, a teacher overview and a fully worked answer key are ready for every lesson.

From teachers

What teachers are saying.

From teachers who have used these lessons in their classrooms.

“

These are awesome lessons -thoughtful problems that get to the heart of the topics. Easy to figure out which students get it based on the questions that they struggle with.

Catherine O

“

This was an incredible resource that kept my students engaged for an entire 1 hour 30-minute block! The differentiated levels were incredible and allowed me to differentiate for the needs of all of my students. Thank you so much for this!

Claire G

“

This was an excellent resource for my students to use when we went through proofs. I was able to teach the concept one day, and give the activity to them the next day to complete with a partner, and it worked well with them! It fueled productive discourse and students were able to problem solve with one another.

Kolbie L

“

Great unit to teach congruent triangles for my struggling learners. I like how it starts with the concept of SSS/SAS/ASA/AAS/HL and then incorporates the reflexive property, vertical angles, corresponding angles, and alternate interior angles. I also like that the proofs are kept until the end of the unit. Well done!

Lisa W

“

Good Unit! My students did very well comprehending this unit compared to the textbook unit I have used in the past. Thank you!

Michelle R

“

I love the ease of readability of all of [the] resources, they are all thoughtfully laid out and easy to implement.

Veronica H

One membership. Every lesson.

$150 a year, or $15 a month. All 11 units and 92 lessons, plus new resources every month. Cancel anytime.

The Geometry Sidekick logo

Who's behind it

Made by a Geometry teacher, for Geometry teachers.

Geometry Sidekick was created by a high school Geometry teacher with two decades of classroom experience, to make your workload a little lighter. Every lesson was built for real classes, and the library keeps growing.

Read more about us →