IB六科三门HL 45分 A-Level三门线性对比 | IB 6 subjects with 3 HL, 45 points vs A-Level 3 linear subjects

2026-10-29 00:05 · 本文部分内容由AI辅助创作

IB六科三门HL 45分 A-Level三门线性对比

国际学校的十年级家长最常问的一个问题是，孩子到底该走 IB 还是 A-Level。两套课程都通向英国、美国、香港和新加坡的大学，但结构完全不同。IB 要求六门学科加三件核心任务，A-Level 通常只读三门，考试全部压在两年末尾。选错课程不会让孩子考不上大学，却会让他在两年里一直做自己不擅长的事。下面按课程结构、评分规则、选课自由度和大学申请衔接逐项拆开对比，事实以 IBO 官网与 Ofqual 官网的公开说明为准。

Families choosing a sixth form programme usually narrow it down to two routes: the IB Diploma or three A levels. Both are accepted by universities in Britain, the United States and across Asia, yet they demand very different work week by week. The comparison below follows structure, scoring, subject choice and university applications, using the published rules from the IBO and Ofqual.

课程结构：六门学科对三门专精

IB 文凭要求学生从六个学科组里各选一门，通常三门高级水平（HL）、三门标准水平（SL）。IBO 官网写明，HL 每门 240 教学小时，SL 每门 150 教学小时，四门 HL 是上限。A-Level 没有这种框架，英格兰的多数学生读三门，两年线性课程，考试在课程结束时一次考完。Ofqual 官网把改革后的 A-Level 描述为线性资格，评估集中在课程末尾，不再有模块化补考。很多学生以为 A-Level 比 IB 少读三门就一定轻松，其实每门的课时更集中，内容深度也更厚。两年的总工作量差得不多，分配方式完全不同。

The IB Diploma requires one subject from each of six groups, normally three at higher level and three at standard level; the IBO sets higher level at 240 teaching hours and standard level at 150, with four higher level subjects as the maximum. A levels work differently, because most students in England take three subjects across two years and sit every paper at the end; Ofqual describes reformed A levels as linear qualifications for exactly that reason. Fewer subjects does not mean an easier fortnight, since the same hours are compressed into fewer timetabled lessons.

必修范围：六组覆盖与自选组合

IB 的六个组分别是语言与文学、语言习得、个体与社会、科学、数学和艺术。前五组必须选，第六组艺术可以用前五组里的第二门替代，所以偏理科的学生也能凑出物理加化学。语言这一块在结构上等于要求学生学两门语言，对英美双申很有用。A-Level 没有任何必修科目，学生可以三门全选理科，也可以数学、经济加历史这样混搭。真正的限制来自学校开了什么课，不少国际学校只开十来门 A-Level。常见的错误是只看课程名字不看开设清单，到了选课周才发现想读的科目没有班。

IB's six groups cover language and literature, language acquisition, individuals and societies, sciences, mathematics and the arts. The first five are compulsory, while the arts group can be replaced by a second subject from another group, which is how a science-heavy student ends up carrying both physics and chemistry; two languages are unavoidable inside that structure. A levels have no compulsory subjects at all, so a student can take three sciences or mix maths, economics and history. The real constraint is the timetable, because many international schools run only a dozen A level subjects.

难度分层：HL 与 SL 的实际差别

IB 的难度分层写在课程设计里，同一门学科分 HL 和 SL，教学小时相差 90 小时，试卷里还有 HL 专属的延长部分。选课要凑够三门 HL，还要顾及大学专业指定的 HL 科目，医学、工程、经济基本都点名要化学、数学或物理的 HL。A-Level 没有层级，一门就是一门，成绩从 A* 到 E，同一份试卷全体考生一起考。常见的错误是把 IB 的 SL 当成 A-Level 的 AS，两者并不对应，SL 也是两年完整课程，只是内容浅一些。用 AS 的难度去估 SL，最后往往会低估工作量。

Difficulty is built into the IB design, since the same subject exists at higher and standard level with 90 teaching hours between them and extra paper sections reserved for higher level candidates. Students must collect three higher level subjects while also satisfying degree requirements, and medicine, engineering or economics usually name the subjects they expect. A levels have no tiers at all, with grades running from A* to E on one shared paper. Treating an IB standard level course as an AS level is a common mistake, because SL still runs for two full years.

评估构成：校内评估加外部考试

IB 的分数来自两条线，外部考试和校内评估。IBO 官网说明，多数科目以考试为基础，语言的口头作业、地理的野外调查、科学的实验、数学的探究报告由学校教师评分，之后由 IB 抽样审核。A-Level 走的是相反方向，改革后非考试评估只在必须考察实操能力的科目保留，其余科目全靠终考。很多学生以为 IB 的校内评估容易拿分，实际 IA 的评分标准和外部考试一样严格，每一分都直接进总分。校内评估的时间成本也不低，一个 IA 常常要占掉几个周末。

IB grades come from two sources, external examinations and work marked inside the school. The IBO states that examinations form the basis of assessment for most courses, while language orals, geography fieldwork, science practicals and maths investigations are teacher assessed and then moderated by the IB; internal assessment is not a soft option, because the criteria are applied as strictly as in the exams. Reform A levels moved the other way and keep non-exam assessment only where practical skills cannot be tested in a written paper.

核心三件套：TOK、EE 与 CAS

IB 的核心是三件事，缺一件都拿不到文凭。认识论（TOK）的考核是一场展览加一篇 1600 词论文。拓展论文（EE）是一篇 4000 词的独立研究，IBO 官网写明这是所有学生的必修部分。创造、活动与服务（CAS）不计分，但七个学习成果要留下证据，还要完成一个 CAS 项目。这三件事占掉的时间经常被低估，很多学生以为 EE 只是加长版作业，其实它要求自己定题、自己找文献、按学术规范写注释。十一年级上学期不定题，第二年春天就会和 IA 撞在一起。

The IB core is three components, and missing any one of them means no diploma. Theory of knowledge is assessed through an exhibition and a 1,600 word essay, while the extended essay is an independent 4,000 word piece of research that the IBO requires of every student; creativity, activity and service carries no points, yet seven learning outcomes must be evidenced and a CAS project completed. The hours involved are routinely underestimated, and the extended essay in particular demands a self-chosen question, real sources and proper referencing.

计分规则：45 分与通过条件

IB 的满分是 45 分，六门学科每门最高 7 分，核心最多再加 3 分。IBO 官网列出的通过条件不止 24 分这一条。六门学科、TOK 和 EE 都必须有成绩，每门不低于 2 分，全卷最多允许两个 2 分、最多三个 3 分及以下，HL 科目合计至少 12 分，CAS 也要达标。换句话说，总分够了但 HL 太弱，照样拿不到文凭。A-Level 没有总分概念，三门各自出等级，大学按单科等级发条件录取。

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The IB diploma tops out at 45 points, with six subjects at a maximum of seven each plus up to three points from the core. The IBO's passing conditions go well beyond the 24 point threshold, since every subject, TOK and the extended essay must be graded, no subject may score below 2, no more than two grade 2s and three grade 3s or below are allowed, higher level subjects must total at least 12 points, and CAS must be complete. A strong total with weak higher level grades still fails, whereas A levels produce three separate grades that universities turn into conditions subject by subject.

等级规则：A* 到 E 与 AS 解耦

A-Level 的成绩是 A* 到 E，改革后没有模块化补考，学生在第二年夏天一次考完所有试卷。AS 已经和 A-Level 解耦，Ofqual 说明 AS 成绩不再计入 A-Level 总分，首批改革科目 2015 年 9 月起施教。有些学校仍让学生在十二年级考 AS，用来检查进度和写预估分，但它对最终等级没有贡献。常见的错误是以为 AS 考砸了还能在十三年级补回来，实际两者已经没有分数上的联系。真正决定等级的是十三年级末尾那几场考试。

A level grades run from A* to E, and reformed specifications are examined at the end of the second year rather than in modules. The AS has been decoupled, so Ofqual confirms that AS results no longer count towards the A level, with the first reformed subjects taught from September 2015; some schools still enter students in Year 12 to check progress and support predicted grades, but those marks do not feed the final result. Assuming a weak AS can be repaired in Year 13 misunderstands how the two qualifications now relate.

选课自由度与偏科的代价

选课自由度直接影响两年的日常状态。IB 的结构把学生留在六个领域，文科强的学生仍要继续学数学和科学，理科强的学生仍要写论文、做语言口头表达。这种设计换来的是广度和写作训练，代价是没法彻底放弃某一科。A-Level 允许真正的专精，三门全理科完全合法，问题在于十六岁时的判断一旦错了，转轨很贵。很多学生以为选课只看喜不喜欢，实际要看三件事：大学专业要求、自己能不能忍两年、学校开不开这门课。

Subject freedom shapes how the two years actually feel. The IB structure keeps every student inside six areas, so a humanities student still studies maths while a science student still writes essays and speaks a language aloud, and that breadth builds real writing stamina. A levels allow genuine specialisation instead, since three sciences are perfectly legal; the risk is that a choice made at sixteen is expensive to undo. Choosing on interest alone ignores degree requirements, stamina and what the school actually teaches.

时间节奏：长任务分散与考试集中

IB 的工作量是分散的。EE 从十一年级就要定题，TOK 的展览和论文穿插在学期里，各科 IA 有自己的截止日期，学生常常同时在推五六个长任务。A-Level 的节奏更集中，前一年半以课堂和校内测试为主，最后半年进入密集复习，考试季一次考完。哪种更累取决于孩子的习惯，能自己排期的人适合 IB，需要外部节奏推着走的人在 A-Level 里更稳。阅卷时能看出这种差别，IB 学生的答案结构工整，A-Level 学生的单题深度往往更强。

IB workload is spread across the two years. Extended essay planning starts in the first year, TOK work sits alongside normal lessons, and every subject has its own internal assessment deadline, so students juggle five or six long tasks at once; A levels concentrate the pressure into eighteen months of lessons followed by one dense revision period and a single exam season. Which is harder depends on the student, because self-directed scheduling suits some teenagers and defeats others who need an external rhythm.

大学申请衔接：UCAS 与美本两条线

英国申请走 UCAS，大学看的是具体科目和等级，三门 A-Level 的预估等级是最常用的判断依据。IB 学生提交总分加 HL 科目组合，很多英国大学的条件录取会同时写总分要求和 HL 单科要求。美国申请看四年成绩单、课程难度和文书，IB 的 EE 与 TOK 在这条线上更容易转成写作素材。用 IB 申英国、用 A-Level 申美国都完全可行，前提是提前两年知道要准备什么。UCAS 官网的课程页面会直接写明各校的科目与等级要求，查一遍比听学长经验可靠。

UK applications run through UCAS, where universities read subject grades and three predicted A level grades remain the standard currency. IB applicants present a total score plus their higher level combination, and many UK offers name both a points total and specific higher level grades; US applications weigh four years of transcripts, course rigour and essays, which is where the extended essay and TOK give IB students usable material. Crossing the two systems is workable as long as the requirements are known two years in advance.

中途转轨：代价与现实约束

中途换轨比想象中贵。IB 转 A-Level 通常要放弃核心任务已经投入的时间，还要确认新学校能不能在十三年级接上线性课程。A-Level 转 IB 更麻烦，六门学科加核心几乎没有补课空间，多数学校只接受在十一年级之前转。两种转轨都要重算预估分，大学申请的时间表也会被推后。很多学生以为换课程只是换教材，实际换的是评估方式和两年的节奏。

Switching mid-course costs more than families expect. Moving from the IB to A levels usually wastes work already done on the core, and the receiving school has to be able to slot a student into linear courses in Year 13; the reverse move is harder still, because six subjects plus the core leave little room for catch-up and most schools only accept it before Year 12. Difficulty is not the only variable, since assessment style and writing stamina matter just as much.

判断标准：三个问题定方向

判断标准可以落到三个问题上。孩子有没有明显偏科，如果三门课之外都不愿意碰，A-Level 更合适。孩子能不能自己管长周期任务，EE 和 IA 需要连续几个月自己推进，没人天天催。目标大学和专业有没有明确指定科目，医学与工程几乎都要求化学、生物或数学的对应等级。三个问题里有两个以上指向同一套课程，答案基本就清楚了。剩下的变量是学校开不开、师资稳不稳，这一条比课程名字重要得多。

Three questions do most of the work. Is the student visibly lopsided, happy to drop everything outside three subjects, in which case A levels fit better? Can they carry a long project without supervision, since the extended essay and internal assessments run for months on end; and do the target degrees name specific subjects, as medicine and engineering almost always do? When two answers point the same way the choice is usually settled, and what remains is whether the school teaches that programme well.

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