<p>“Course Sequence – Average Grade
Chem 31a/31b or 31x – B, B+ or B+
Chem 135 or 171 and 181 or 183 – B+ or A- and B+ or B+
Bio 41/42/43 — B, B, B+”</p>
<p>Data - what gets lost in translation is that that 31 series in chemistry has about 300-400 students in each class, with 40-50% getting a grade below a B+, essentially a death knell to their aspirations for a career in medicine.</p>
<p>These are acting as weeder classes at Stanford where 600-700 students show up aspiring to be doctors each year and only 200-250 get there 4 years later.</p>