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science </a></li><li><a href="../19519/metals-and-icp-spectroscopy-1.html">Metals and ICP spectroscopy</a></li><li><a href="../19541/catalysts--1.html">Catalysts </a></li><li><a href="../19580/liquid-crystals-1.html">Liquid crystals</a></li><li><a href="../19665/polymers--1.html">Polymers </a></li><li><a href="../19672/nanotechnology-1.html">Nanotechnology</a></li><li><a href="../19843/environmental-impact-plastics-1.html">Environmental impact - plastics</a></li><li><a href="../19858/superconducting-metals-x-ray-crystallography--1.html">Superconducting metals & X-ray crystallography </a></li><li><a href="../19666/condensation-polymers-1.html">Condensation polymers</a></li><li><a href="../19916/environmental-impact-heavy-metals-1.html">Environmental impact - heavy metals</a></li></ul></li><li><a href="../19284/option-b--1.html" class="father">Option B </a><ul class="level-2"><li><a href="../19290/introduction-to-biochemistry--1.html">Introduction to biochemistry </a></li><li><a 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nuclear fission reactions</a></li><li><a href="../19429/solar-energy-1.html">Solar energy</a></li><li><a href="../19437/environmental-impact-global-warming-1.html">Environmental impact - global warming</a></li><li><a href="../19453/electrochemistry-rechargeable-batteries-fuel-cells-1.html">Electrochemistry, rechargeable batteries & fuel cells</a></li><li><a href="../19458/nuclear-fusion-fission-hl--1.html">Nuclear fusion & fission (HL) </a></li><li><a href="../19470/photovoltaic-cells-and-dsscs-1.html">Photovoltaic cells and DSSCs</a></li></ul></li><li><a href="../19078/option-d-1.html" class="father">Option D</a><ul class="level-2"><li><a href="../19079/pharmaceutical-products-drug-action--1.html">Pharmaceutical products & drug action </a></li><li><a href="../19158/aspirin-penicillin--1.html">Aspirin & penicillin </a></li><li><a href="../19174/opiates-1.html">Opiates</a></li><li><a href="../19184/ph-regulation-of-the-stomach-1.html">pH regulation of the stomach</a></li><li><a href="../19194/antiviral-medications--1.html">Antiviral medications </a></li><li><a href="../19211/environmental-impact-of-some-medications-1.html">Environmental impact of some medications</a></li><li><a href="../19254/taxol-a-chiral-auxiliary-case-study-1.html">Taxol - a chiral auxiliary case study</a></li><li><a href="../19258/nuclear-medicine--1.html">Nuclear medicine </a></li><li><a href="../19273/drug-detection-analysis--1.html">Drug detection & analysis </a></li></ul></li></ul></li><li><a href="../16592/practical-scheme-of-work-ia--1.html">Practical scheme of work & IA </a><ul class="level-1"><li><a href="../16682/internal-assessment-1.html" class="father">Internal Assessment</a><ul class="level-2"><li><a href="../18892/scaffolding-the-investigation-1.html">'Scaffolding' the investigation</a></li><li><a href="../18896/timing-organisation--1.html">Timing & organisation </a></li><li><a href="../18905/choosing-the-research-question-1.html">Choosing the research question</a></li><li><a href="../18946/personal-engagement-1.html">Personal engagement</a></li><li><a href="../18950/exploration-1.html">Exploration</a></li><li><a href="../18957/analysis-1.html">Analysis</a></li><li><a href="../18965/evaluation-1.html">Evaluation</a></li><li><a href="../18966/communication-1.html">Communication</a></li><li><a href="../19882/internal-standardization-of-the-ia-1.html">Internal standardization of the IA</a></li><li><a href="../19901/submitting-the-samples-for-moderation-2.html">Submitting the samples for moderation</a></li><li><a href="../33754/ten-suggestions-for-ias-using-secondary-data-1.html">Ten suggestions for IAs using secondary data</a></li><li><a href="../37544/gaining-full-marks-for-a-databased-ia--1.html">Gaining full marks for a databased IA </a></li><li><a href="../19506/ia-example-marking-exercise--1.html">IA example & marking exercise </a></li><li><a href="../23929/genuine-examples-of-moderated-ia-reports-1.html">Genuine examples of moderated IA reports</a></li><li><a href="../25234/examples-of-teacher-marked-ia-reports--1.html">Examples of teacher-marked IA reports </a></li><li><a href="../37542/history-of-internal-assessment-1.html">History of Internal Assessment</a></li></ul></li><li><a href="../16598/mandatory-laboratory-components-1.html" class="father">Mandatory laboratory components</a><ul class="level-2"><li><a href="../16613/formula-of-magnesium-oxide--1.html">Formula of magnesium oxide </a></li><li><a href="../16612/determining-the-mr-of-an-unknown-gas-1.html">Determining the <i>M</i><sub>r</sub> of an unknown gas</a></li><li><a href="../16615/acid-base-titrations--1.html">Acid-base titrations </a></li><li><a href="../16616/a-green-acid-base-practical-1.html">A green acid-base practical</a></li><li><a href="../16617/analysis-of-aspirin-tablets-1.html">Analysis of aspirin tablets</a></li><li><a href="../16618/caco3-in-egg-shells-1.html">CaCO<sub>3</sub> in egg shells</a></li><li><a href="../16644/enthalpy-changes-1.html">Enthalpy changes</a></li><li><a href="../16631/reaction-rates-1.html">Reaction rates</a></li><li><a href="../16635/rate-dependent-factors-1.html">Rate-dependent factors</a></li><li><a href="../16636/determining-ea-for-a-reaction-1.html">Determining <i>E</i><sub>a</sub> for a reaction</a></li><li><a href="../16637/iodination-of-propanone-1.html">Iodination of propanone</a></li><li><a href="../18144/titrations-with-a-ph-meter-1.html">Titrations with a pH meter</a></li><li><a href="../18355/redox-titration-with-kmno4--1.html">Redox titration with KMnO<sub>4</sub> </a></li><li><a href="../16640/voltaic-cells-1.html">Voltaic cells</a></li><li><a href="../16659/3-d-molecular-modelling--1.html">3-D molecular modelling </a></li></ul></li><li><a href="../17168/other-good-practicals-1.html" class="father">Other good practicals</a><ul class="level-2"><li><a href="../17196/common-chemical-reactions-1.html">Common chemical reactions</a></li><li><a href="../227/elements-oxides-of-the-third-period--1.html">Elements & oxides of the third period </a></li><li><a href="../17239/the-halogens-1.html">The halogens</a></li><li><a href="../17162/boiling-points-of-mixtures-1.html">Boiling points of mixtures</a></li><li><a href="../17170/polarity-of-molecules-1.html">Polarity of molecules</a></li><li><a href="../18083/le-chateliers-principle--1.html">Le Chatelier's principle </a></li><li><a href="../19582/determining-kc-for-an-esterification-reaction-1.html">Determining <i>K</i><sub>c</sub> for an esterification reaction</a></li><li><a href="../18164/redox-reactions-of-vanadium--1.html">Redox reactions of vanadium </a></li><li><a href="../18351/chlorine-in-swimming-pools--1.html">Chlorine in swimming pools </a></li><li><a href="../18178/analysis-of-cuii-ions-in-solution--1.html">Analysis of Cu(II) ions in solution </a></li><li><a href="../18179/percentage-of-copper-in-brass-1.html">Percentage of copper in brass</a></li><li><a href="../18356/electrolytic-cells--1.html">Electrolytic cells </a></li><li><a href="../18598/reactions-of-organic-compounds-1.html">Reactions of organic compounds</a></li><li><a href="../18752/hydrolysis-of-halogenoalkanes-1.html">Hydrolysis of halogenoalkanes</a></li><li><a href="../18784/preparation-of-13-dinitrobenzene--1.html">Preparation of 1,3-dinitrobenzene </a></li><li><a href="../19022/determination-of-an-organic-structure-1.html">Determination of an organic structure</a></li><li><a href="../19887/preparation-of-nylon-66-1.html">Preparation of nylon 6,6</a></li><li><a href="../19343/determination-of-vitamin-c-content--1.html">Determination of vitamin C content </a></li><li><a href="../19342/hydrolysis-of-starch--1.html">Hydrolysis of starch </a></li><li><a href="../19159/preparation-purification-of-aspirin--1.html">Preparation & purification of aspirin </a></li></ul></li><li><a href="../18851/ict-in-practical-work-1.html" class="father">ICT in practical work</a><ul class="level-2"><li><a href="../18852/data-logging--1.html">Data logging </a></li><li><a href="../18853/software-for-graph-plotting--1.html">Software for graph plotting </a></li><li><a href="../18854/spreadsheets-for-data-processing--1.html">Spreadsheets for data processing </a></li><li><a href="../18855/databases-1.html">Databases</a></li><li><a href="../18856/computer-modelling-simulations--1.html">Computer modelling & simulations </a></li></ul></li><li><a href="../16594/group-4-project-1.html" class="father">Group 4 Project</a><ul class="level-2"><li><a href="../16595/practicalities-1.html">Practicalities</a></li><li><a href="../16596/reflective-statement--2.html">Reflective statement </a></li></ul></li><li><a href="../16666/a-new-laboratory-1.html">A new laboratory?</a></li></ul></li><li class="selected"><a href="../16284/exams-1.html">Exams</a><ul class="level-1"><li><a href="../16286/essential-facts-1.html" class="father">Essential Facts</a><ul class="level-2"><li><a 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concepts</a></li><li><a href="../3507/why-tok-chemistry-1.html">Why TOK & Chemistry?</a></li><li><a href="../3505/a-modern-paradigm-1.html">A modern paradigm</a></li></ul></li></ul></li><li><a href="../17783/fast-track-to-tests-questions-1.html">Fast track to tests & questions</a><ul class="level-1"><li><a href="../17784/sl-multiple-choice-tests-on-individual-topics-1.html">SL Multiple choice tests on individual topics</a></li><li><a href="../24351/sl-multiple-choice-quizzes-on-sub-topics-1.html">SL Multiple choice 'quizzes' on sub-topics</a></li><li><a href="../31519/sl-practice-paper-1-exams-1.html">SL Practice Paper 1 exams</a></li><li><a href="../17786/sl-questions-on-each-sub-topic-1.html">SL Questions on each sub-topic</a></li><li><a href="../20431/sl-paper-3-section-a-questions-1.html">SL Paper 3 Section A questions</a></li><li><a href="../17792/sl-questions-on-the-options-1.html">SL Questions on the options</a></li><li><a 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</div><section id="main-content"><div class="blueBg"><h1>Basic information about the marking process</h1><p>When the examination is finished the scripts are sealed and sent off for scanning in the case of Papers 2 and 3 and to be optically read in the case of the Paper 1 multiple choice answer sheet. The digitalized form of the students' answers to Paper 2 and Paper 3 are then sent electronically to assistant examiners for marking.</p><p>Any unsent examination papers such as Paper 1 and unused Papers 2 and 3 must be locked away in the school for the next 24 hours after the examination. This means that as a teacher you will not be able to see the paper until after then. It is important that you do eventually see the papers and comment on them as you should then complete a Teacher Feedback form. This will be covered in the next section on <a href="../16319/commenting-on-the-exams-1.html" title="Exams » The examination process » Commenting on the exams">Commenting on the exams</a>.</p><hr class="hidden"><p>The assistant examiners form part of a team. A team consists of about ten assistant examiners and is led by a Team Leader. There are several Chemistry teams and they form part of the overall marking system led by the Principal Examiner for the particular paper.</p><hr class="hidden"><p style="text-align: center"><img alt="" class="centre" height="279" src="../../../ib/chemistry/images/Exams/Exam%20hierachy.jpg" title="Exam marking hierachy" width="448"></p><hr class="hidden"><p>The answers and the markscheme have been formulated beforehand at the paper setting meeting but before anyone can start marking for real there is a standardization meeting. This is carried out by the Principal Examiner and some of the Team Leaders. They mark some scripts in pencil according to the markscheme and make a note of any areas where students are giving alternative acceptable answers or interpreting the question in a different (but correct) way which can lead to different acceptable answers to those on the markscheme. They also ask the members of their team if they have any relevant comments. This meeting used to take place at IBCA in Cardiff about five to six days after the examination. For the past few years it has taken place online using VoIP (such as Skype). </p><p>During the standardization meeting the markscheme is completely reviewed in the light of the answers given by students. Attention is also given to ensure that those parts of the paper that are common to both SL and HL have the same revisions made to the markschemes Team Leaders then mark a few scripts and compare their marks to ensure uniformity of interpretation with the Principal Examiner. For the May session there is also some liaising between the two times zones to ensure a similar standard of marking. The revised markscheme is then published and the paper and revised markscheme made available to all assistant examiners who are then able to proceed with marking their allocation about one week after the examination has taken place. At the same time the Principal examiner marks what are known as 'seeded scripts'. For every twelve digitalised scripts that an assistant examiner marks two of them will be the seeded scripts. This is a way of checking assistant examiners are marking to the same standard as the Principal Examiner. If their marks are not in reasonable agreement with the seeded script marks then their marking is terminated.</p><p>Examiners must adhere to the published markscheme. If they come across something that they are unsure how to mark they can e-mail the problem to their Team Leader. In consultation with the Principal Examiner the problem and the Principal Examiner’s response to it are then circulated to all the examiners so that as far as possible everyone is operating to the same standard. That standard is, of course, the standard set by the Principal Examiner. Examiners mark digitally in red ink and are told to put a tick whenever the student has written enough to justify the mark and place the actual mark(s) achieved alongside the possible mark(s) for each sub-question. The marks are then totalled up electronically for each question. When there is some doubt about whether to award a mark or not examiners are encouraged to write a relevant note alongside the relevant scanned box. The precise marking instructions given to examiners can be found at the bottom of this page. The total marks for all the questions marked are entered electronically onto a secure site called IBIS. It does depend on the length of the paper but most examiners will mark in the region of 100 – 150 scripts from a wide range of different schools worldwide. </p><p>The Principal Examiner marks some of his own scripts and liaises with all the Team Leaders and also any assistant examiners in his own team. All the marks from all examiners must be entered on IBIS within one month of the examination being sat and all the marked scripts are sent digitally to IBCA in Cardiff by that date too. This is to ensure that all the necessary information is available for the Grade Award meeting. </p><hr class="hidden"></div><hr class="hidden"><div class="greenBg"><h1>Instructions to assistant examiners </h1><p>The instructions given to examiners are important to you when you come to mark your own students' work – particularly for the mock exam - as you need to be sure that your marking follows as closely as possible the marking of the Principal Examiner. When you go to IB workshops you will often be given one or more sample scripts to mark as part of your training. This can be a useful exercise. What is important for examiners is that they are consistent. It is not quite so important that they agree exactly with the Principal Examiner as that is the purpose of moderation. </p><p>There is a single set of instructions. Apart from the number of questions etc., the instructions for Chemistry Papers 2 and 3 are essentially the same. The exact wording for the instructions is IB copyright but given below are the essential points.</p><hr class="hidden"><h3>General points:</h3><ul><li>The maximum mark for each question sub-part is shown in the “Total” column.<br> </li><li>Each marking point in the “Answers” column is shown by means of a tick at the end of the marking point.<br> </li><li>If a question sub-part has more marking points than the total allows, it will be indicated by “max” written after the mark in the “Total” column.<br> </li><li>An alternative wording is indicated in the “Answers” column by a slash (/). Either wording can be accepted.<br> </li><li>An alternative answer is indicated in the “Answers” column by “OR” on the line between the alternatives. Either answer can be accepted.<br> </li><li>Words in angled brackets ‹ › in the “Answers” column are not necessary to gain the mark.<br> </li><li>Words that are <u>underlined</u> are essential for the mark.<br> </li><li>Do not award a mark where there is contradiction within an answer.<br> </li><li>Unless stated to the contrary the order of marking points does not have to follow the order given in the markscheme.<br> </li><li>If the candidate’s answer has the same “meaning” or can be clearly interpreted as being of equivalent significance, detail and validity as that in the “Answers” column then award the mark. Where this point is considered to be particularly relevant in a question it is emphasized by OWTTE (<strong>o</strong>r <strong>w</strong>ords <strong>t</strong>o <strong>t</strong>hat <strong>e</strong>ffect) in the “Notes” column.<br> </li><li>As many candidates are writing in a second language effective communication is more important than grammatical accuracy.<br> </li><li>Occasionally, a part of a question may require an answer that is required for subsequent marking points. If an error is made in the first marking point then it should be penalized. However, if the incorrect answer is used correctly in subsequent marking points then follow through marks should be awarded. When marking, indicate this by adding ECF (error carried forward) on the script. “ECF acceptable” will be displayed in the “Notes” column.<br> </li><li>Errors in units or significant figures should not be penalised, unless they are referred to specifically in the “Notes” column.<br> </li><li>Missing or incorrect state symbols in an equation should be ignored unless directed otherwise in the “Notes” column.<br> </li><li>Do not award a mark for a correct formula if a question specifically asks for the name of a substance, or, if the formula is asked for, do not award a mark for the correct name.<br> </li><li>If a question asks for an equation for a reaction, a balanced symbol equation is usually expected unless otherwise stated in the markscheme.<hr class="hidden"></li></ul></div><p class="MsoNormal" style="margin: 0cm 0cm 0pt"></p></section></article><section id="media-extras"><div class="page-actions no-print navbar inline hidden-desktop"><div class="navbar-inner"><ul class="nav"><li><a class="presentation" href="#" onclick="return false;"><i class="fa fa-desktop"></i></a></li><li><a class="print-section-blog" href="#" onclick="return false;"><i class="fa fa-print"></i></a></li><li><a class="page-bookmarker" data-ticket="IB Docs (2) Team" data-pid="16318" href="#" onclick="return false;"><i class="fa fa-star"></i></a></li><li><a class="personal-notes" href="#" onclick="return false;"><i class="fa fa-file-text"></i></a></li><li><a class="" data-toggle="modal" href="#modal-feedback" onclick="return false;"><i class="fa fa-envelope-o"></i></a></li><li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" data-target="#" href="#"><i class="fa fa-share-alt"></i></a><ul class="dropdown-menu" role="menu"><li><a class="" target="_blank" title="Share on Twitter" href="https://twitter.com/share?text=%22Marking+the+papers%22+-+via+%40InThinker+%23chemistry%0A&url=https%3A%2F%2Fwww.thinkib.net%2Fchemistry%2Fpage%2F16318%2Fmarking-the-papers"><i class="fa fa-twitter-square"></i><span>Twitter</span></a></li><li><a class="" target="_blank" title="Share on Facebook" href="https://www.facebook.com/sharer.php?u=https%3A%2F%2Fwww.thinkib.net%2Fchemistry%2Fpage%2F16318%2Fmarking-the-papers&t=Marking+the+papers"><i class="fa fa-facebook-square"></i><span>Facebook</span></a></li><li><a class="" href="http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fwww.thinkib.net%2Fchemistry%2Fpage%2F16318%2Fmarking-the-papers"><i class="fa fa-linkedin-square"></i><span>LinkedIn</span></a></li><li><a class="" href="https://plus.google.com/share?url=https%3A%2F%2Fwww.thinkib.net%2Fchemistry%2Fpage%2F16318%2Fmarking-the-papers"><i class="fa fa-google-plus-square"></i><span>Google +</span></a></li><li><a class="" href="mailto:?subject=Marking the papers&body=When the examination is finished the scripts are sealed and sent off for scanning in the case of Papers 2 and 3 and to be optically read in the case of the Paper 1 multiple choice answer sheet. 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