Table 1. Cell biology cohorts studied in this report.

(A) The year 1–2 pathway includes four cohorts that entered UCL between 2013–2016 and took a year 1 and year 2 course in cell biology. *>99% of students stayed with their cohort as it progressed in the pathway. Results for the other ~1% were allocated to the year they took the course. (B) The year 3 study includes students that entered UCL between 2012–2016 and took one of four courses. For each course, the marks of students from all five years groups are aggregated together. All academic years start in October and end June the following year. Final year is based on three year bachelor’s or four year master’s undergraduate degree.

A
Year 1–2 pathway *	Year of entry in to university	Start of the academic year in which year 1 course was taken	Start of the academic year in which year 2 course was taken		Start of the academic year in which final year was taken
Cohort 1	2013	2013	2014		2015 or 2016
Cohort 2	2014	2014	2015		2016 or 2017
Cohort 3	2015	2015	2016		2017 or 2018
Cohort 4	2016	2016	2017		2018 or 2019
B
Year 3 study	Year of entry in to university	Start of the academic year in which year 3 course was taken	Start of the academic year in which final year was taken
Course A	2012–16	2014–2018	2014–2019
Course B	2012–16	2014–2018	2014–2019
Course C	2012–16	2014–2018	2014–2019
Course D	2012–16	2014–2018	2014–2019