Credit for work done?

I answered several challenges in HTML CSS the last session . Today I see no indication that those challenges were already done . How do I get credit for work done ?

@bensrosen

If your snippets of code run without error, you should be prompted with a curriculum completion percentage and an option to submit your progress or download the solution. The only way freecodecamp can save your work is if you submit your solution after you test your code.
If you are not being prompted, for satisfying the exercise problem set, then you may have browser compatibility issues.