Initially, you start using CoCalc under a free trial plan in order to test out the service. You should then switch to using one of the subscription options. Once you sign up for any subscription, there is an option "Hide free warnings" in account preferences to remove the red banner. Listed prices are in US dollars (when charging in local currency, the prices are converted into local currency using the conversion rates published by leading financial institutions).
We offer course packages to support teaching using CoCalc. They start right after purchase and last for the indicated period and do not auto-renew. Follow the instructor guide to create a course file for your new course. Each time you add a student to your course, a project will be automatically created for that student. You can create and distribute assignments, students work on assignments inside their project (where you can see their progress in realtime and answer their questions), and you later collect and grade their assignments, then return them.
Payment is required. This will ensure that your students have a better experience, network access, and receive priority support. The cost is between $4 and $14 per student, depending on class size and whether you or your students pay. Start right now: you can fully setup your class and add students immediately before you pay us anything!
zip -r9 "[filename].zip" [directory-name...]
tar cjvf "[filename].tar.bz2" [directory-name...]
[filename]with the actual filename and
[directory-name]by one or more filenames or directory names.) Afterwards, download the archive as explained above.