Yes, we only meet twice a week.

Our Co-op meets twice a week for 90 minutes.  All reading, projects, lab reports, and tests take place outside class.  I have time carved out after class for extra help.  Frequently, I edit reports outside class with kids individually.  The 90 minutes of class starts on time and is focused. I pull out all the materials and we don’t waste time on distractions.  The 90 minutes are used for direct instruction, class discussion and tons of activities—all designed to promote the lessons.  Believe me, I have an entire course to cover before the end of May.  We don’t dawdle.  At the Co-op in Winchester, I taught three hours, once a week.  That time was fast paced, too.  I think you need three hours of lessons a week at a minimum for Biology, Physics, and Chemistry, at the high school level.  Again, class time has to remain honed on lessons, direct instruction, labs, and hands-on activities.  All the tests, grading, editing, corrections, etc, have to take place outside of class time.