SL Environmental Systems And Societies

SL Environmental Systems And Societies
Boundary*	Markband (≥)
Boundary*	1	2	3	4	5	6	7
Average	0.0	11.2	22.3	33.6	44.6	56.6	67.4
SD	0.0	1.0	1.9	1.8	1.9	2.2	2.7
N25 TZ3	0	11	23	33	45	57	68
N25 TZ1	0	13	25	35	47	60	71
M25 TZ3	0	12	23	36	46	57	67
M25 TZ2	0	12	23	35	45	56	66
M25 TZ1	0	11	22	34	45	56	67
N24 TZ2	0	12	24	35	46	60	71
N24 TZ1	0	11	22	32	43	57	69
M24 TZ2	0	10	21	33	44	55	65
M24 TZ1	0	10	20	33	43	55	66
N23 TZ2	0	12	24	34	46	58	70
N23 TZ1	0	10	21	32	43	56	66
M23 TZ2	0	11	23	35	45	55	65
M23 TZ1	0	10	20	33	44	56	67
N22 TZ0	0	11	22	32	44	57	69
M22 TZ0	0	10	18	30	40	52	62
M21 TZ0	0	10	20	30	41	52	62
N20 TZ0	0	12	24	34	46	59	71
N19 TZ0	0	13	26	36	48	60	71
M19 TZ0	0	12	23	36	46	57	67

TZ0: Worldwide • TZ1: Americas • TZ2: Europe, Africa, Asia-Pac

COVID Trend: N20–N22 boundaries were artificially lower than standard cycles.

Syllabus: Beware of using outdated boundaries for updated subject syllabuses.

Regional Trends: TZ2 generally has higher boundaries than TZ1; ensure your timezone is correct.

Session Trends: November boundaries tend to be higher than May. Compare cycles carefully.