This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IB Cardiff.
Instructions to Examiners Abbreviations M (M) A (A) R N AG Marks awarded for attempting to use a correct Method; working must be seen. Marks awarded for Method; may be implied by correct subsequent working. Marks awarded for an Answer or for Accuracy; often dependent on preceding M marks. …show more content…
(Example 3) Exceptions to this rule will be explicitly noted on the markscheme. If a candidate makes an error in one part, but gets the correct answer(s) to subsequent part(s), award marks as appropriate, unless the question says hence. It is often possible to use a different approach in subsequent parts that does not depend on the answer to previous parts. (Example 3)
If a candidate incorrectly copies information from the question, this is a mis-read (MR). Apply a MR penalty of 1 mark to that question. Award the marks as usual and then stamp MR against the answer. Scoris will automatically deduct 1 mark from the question total. A candidate should be penalized only once for a particular mis-read. Do not stamp MR again for that question, unless the candidate makes another mis-read.
If the question becomes much simpler because of the MR, then use discretion to award fewer marks. If the MR leads to an inappropriate value (e.g. probability greater than 1, use of r 1 for the sum of an infinite GP, sin 1.5 , non integer value where integer required), do not award the mark(s) for the final answer(s). Miscopying of candidates’ own work does not constitute a misread, it is an error.
7 Discretionary marks (d)
An examiner uses discretion to award a mark on the rare occasions when the markscheme does not cover the work seen. The mark should be labelled (d) and a brief note written next to