#1 Feedback tool for Google Docs


Stop repeating yourself. Use Kaizena's built-in Lessons to quickly attach explainer videos to highlights. Or save your own videos, voice and text comments as Lessons.

"The amount of time it takes to read the essay is how long it takes to give feedback."

Vivian Cassel teaches English at Östra Gymnasiet, in Huddinge, Sweden. Before she started using Kaizena in 2013, "It used to take at shortest 30 minutes, and now it takes about 10-15 minutes. And that would be an essay of about 1500 words." Vivian uses Lessons to save her detailed feedback for re-use. Best of all, saving time doesn't come at the expense of quality: "My students talk about how well I give feedback, how quickly I give feedback, and how technologically advanced I am - they love it!"

"67% of millennials agree that they can find a YouTube video on anything they want to learn."
Google Consumer Survey, April 2015, U.S

Built-in Lessons for your Subject

We've curated hundreds of Lessons for common mistakes spanning grade level and subject, including English, Science, History, and Math.

Link to any Website

Save any website as a Lesson, then re-use that Lesson when reviewing student work.

Share your Lessons

Share your Lessons with your department, school, or district. Finally! Everything in the same place, and everyone on the same page.

Save YouTube Videos as Lessons

Videos are automatically embedded in the conversation, so students never have to leave your feedback.

Save Voice and Text Comments

Find yourself saying the same thing often? Save your voice or text comment as a Lesson, and re-use it next time.

Explore Lessons Created by Others

Why re-invent the wheel? Find lessons shared by others in your department, school, district - or anywhere in the world.


How Teachers Use Kaizena

Using Lessons to Save More Time

After years of using Kaizena, Vivian finds that the feature that she loves the most is Lessons, because it allows her to quickly give students feedback, without needing to repeat herself over and over again.

Online Learning
Online Learning Needs Feedback, too!

“Ok everyone, please log in to your Timex™ computers.” Timex? Back in the 1984, my first computer was a Timex (I was in 3rd grade).

Writer's Workshop
Kaizena + The Digital Writer's Notebook

Gerard, a Kaizena teacher shares how he scaffolds the writing process and uses a paperless way to have students practice writing, get feedback, and make consistent progress.

I see and I remeber. I do and I understand.

Try Kaizena for Yourself

Review up to 75% faster than typing with Voice Comments. Embed explainer videos in three clicks. Track Skills and we'll auto-complete your rubric. Welcome to the future of feedback.