Complete an unlimited number of Knowledge Series lessons this month. On our Standard Schedule, younger students will typically complete 2 lessons each day and older students will typically complete 4-5. Some lessons are available for bilingual use.
Satisfaction is guaranteed. If your student completes all of the lessons in the unit but does not meet the unit's academic objective, we will refund your subscription for the time you were working on the unit, up to 3 months.
Subscribe and save $5/month