CheckiO

What CheckiO is

CheckiO is a game-based coding challenge platform for practicing Python and TypeScript. It offers more than 500 missions across categories and skill levels, and users can review other members' solutions. Teachers can use CheckiO Classrooms to create student groups, assign work, follow progress, and give feedback. They can control whether student profiles, solutions, and comments are visible to other CheckiO users. Classroom tools include solution histories, views of unfinished work, and the option to join pair-coding sessions when students are online.

The free version limits Classroom analytics to the first three students and solution search to the first five results. A console tool and web extension let users solve missions with local files. CheckiO also describes customizable product integrations, citing SendGrid API missions, and offers businesses product promotion and candidate sourcing services. The service is available on the web and as an extension; its Teachers page describes mobile access. The teacher trial lasts seven days and requires no credit card. Paid Awesome plans list all missions, no ads, and unlimited solution search, starting with Awesome Monthly at $4.99 a month. A separate Awesome Teacher plan is listed at $499.99, paid once.

Who it suits

CheckiO suits beginners and advanced programmers who want Python or TypeScript practice through coding missions. Its Classroom features are aimed at teachers who need to assign tasks, track student progress, and give feedback.

Limits

The free version limits Classroom analytics to the first three students and solution search to the first five results. Awesome plans provide unlimited solution search, all missions, and no ads; the Teacher plan adds classroom analytics.

Getting started

1. Open the CheckiO website
2. Choose the web experience or install the extension
3. Select free access or an Awesome plan
4. Teachers can start the seven-day trial without a credit card
5. Use the console tool or web extension with local files
6. Create classroom groups and assign missions if teaching

Verdict

CheckiO combines coding practice with tools for classroom assignment and feedback. Its free limits and separate teacher offering are worth considering when deciding whether it fits individual practice or a classroom.