Biology

2025 graded assessment distributions

2025 Grade Distributions

Percentage of students in each grade for every graded assessment.

WRITTEN EXAMINATIONMean 143.5Std Dev 49.4Median C+Max 240Assessed 14,700

Exam score to study score (approximate)

Grade	Exam score range	≈ Study score range
UG	0–23 / 240	6–9
E	24–53 / 240	10–17
E+	54–70 / 240	18–21
D	71–88 / 240	22–23
D+	89–111 / 240	24–26
C	112–135 / 240	27–29
C+	136–159 / 240	30–31
B	160–179 / 240	32–34
B+	180–194 / 240	35–36
A	195–207 / 240	37–39
A+	208–240 / 240	40–50

Study score ranges are estimated by matching each grade's share of the exam cohort to the 2025 study score distribution. The study score assumes you performed similarly in your coursework, so treat these as a guide only.

2025 Graded Assessment Score Ranges & Grade Distributions

COURSEWORK UNIT 3 (School-assessed Coursework)

Max Score: 80

Grade distribution for COURSEWORK UNIT 3
Grade	Score Range	% Cohort	Students
UG	0–5	0.2%	31
E	6–10	0.3%	53
E+	11–24	3.6%	547
D	25–31	7.1%	1,078
D+	32–39	12.3%	1,867
C	40–47	13.7%	2,089
C+	48–55	15.5%	2,363
B	56–62	15.6%	2,377
B+	63–67	12.4%	1,888
A	68–72	11.9%	1,806
A+	73–80	7.3%	1,104

COURSEWORK UNIT 4 (School-assessed Coursework)

Max Score: 120

Grade distribution for COURSEWORK UNIT 4
Grade	Score Range	% Cohort	Students
UG	0–11	0.1%	8
E	12–23	0%	7
E+	24–33	0.2%	29
D	34–51	3.7%	539
D+	52–58	5.5%	808
C	59–67	10.9%	1,605
C+	68–78	14.8%	2,189
B	79–89	17.6%	2,596
B+	90–99	18%	2,658
A	100–107	16.8%	2,475
A+	108–120	12.4%	1,833

WRITTEN EXAMINATION (Written Exam)

Max Score: 240

Grade distribution for WRITTEN EXAMINATION
Grade	Score Range	% Cohort	Students	Approx Study Score
UG	0–23	0.1%	16	6–9
E	24–53	3.4%	504	10–17
E+	54–70	5.7%	845	18–21
D	71–88	8.1%	1,184	22–23
D+	89–111	11.3%	1,659	24–26
C	112–135	13.2%	1,938	27–29
C+	136–159	14.9%	2,190	30–31
B	160–179	13.5%	1,987	32–34
B+	180–194	11.8%	1,732	35–36
A	195–207	9.7%	1,428	37–39
A+	208–240	8.3%	1,217	40–50