How can we narrow the holes in the sieve?
BIO 201 is considered a ‘sieve’ class, in that it often weeds out the students who are not ready to advance to more difficult classes, and it is not uncommon for 40-50% of the class to fail, making the holes in the sieve rather large.
High school biology is the only prerequisite to enroll in BIO201 and it seems that students who have taken a BIO 156/181 prior to 201 have performed better. To evaluate this observation, an informal survey was given to students to gather information about their previous biology experience.