Hi @crystal w thanks for posting in the community! Would you mind clarifying what you mean by 'grade levels'? Are you referring to school grade levels? 

If so lucid offers free educational upgrades to students and educators! The free upgrade gives you access to the features described here including unlimited objects and three editable documents. 

K-12

If you are a student or educator in a K-12 school and have signed up for a free Lucid account using your school-issued email address you will be automatically upgraded to a free educational account.

 Higher Ed

If you are a student or educator at a university or college and have signed up for a free Lucid account using your school issued email address and have also chosen “Student” or “Educator” in the persona picker when setting up your account you will be automatically upgraded to a free educational account.

If you are not automatically upgraded please fill out this form to request your educational upgrade.

If this information doesn't answer your question please share some additional information and I would be happy to assist. Thank you!