Get it right – DCP tips

Octobers blog post focused on getting Design labs right so I thought it would be worth staying with the theme of IA labs and giving some tips / hep on DCP. There are two ways in which your teacher will give you an IA lab: (1)  They may ask you to first design a lab and then carry it out and analyse the data. This is the hard way – it can (sometimes) be really hard to produced good IA data from ...

Internal Assessment (IA) – An introduction / review

By Sunday, September 1, 2013 , , , , 0

Now that the long summer holidays are coming to an end, it is time to start thinking about school again. If you are about to start your IB diploma, or have already been studying the diploma for a year, one thing you will have to do is ensure that your IA (internal assessment) lab reports are up to speed. For those of you not familiar with the IA programme, you need to carry out 60 hours of lab work at HL and ...

Top Tips for the Teacher (2)

Stuck for some IA labs to assess in the DCP and CE categories? Try using these ideas to plan some labs: •How much Iron in an Iron Tablet – Redox Titration •Determine conc. of Hydrogen Peroxide – Redox Titration •Determine the formula of a complex ion (colorimetry) •Molecular mass of a volatile liquid •Heat of combustion of alcohols •Calculate the enthalpy of solution •Determine the activation energy of a reaction

My examiners report for DP marking

School is done!!! reports are written and farewells given to departing colleagues. As I reflect on the 150 scripts I marked I thought it useful to share some of my observations. I marked TZ1 but I feel my comments have relevance for all. At the end of the examiners report that all assistant examiners have to write, there is a section asking for "Recommendations and guidance for the teaching of future candidates". Invariably I have, and continue to mention a lack of comprehension ...

Internal assessment and the OCC

The OCC website is a valuable resource which I believe to be overlooked by the busy teacher. However I am here to share a recent experience and to say that if you have not looked or used it recently, its good and you should.     Its Grade 11 internal assessment season at my school as I finish marking the students first full design lab on Enzymes and busy myself prepping them for their second on Plant Science before the end of the ...

IA DCP aspects 2 and 3

I would now like to focus on what is required for DCP aspects 2 and 3 from the comments I have collated from the OCC website including subject reports and moderated material. When processing raw data it is important that a sample calculation is included in the report unless a student carries out the T-test or standard deviation for which programs exist on such things as excel or a scientific calculator such as the Ti83/84. For such examples as these students ...

IA DCP Aspect 1

Following on from my last blog I would now like to focus on Data Collection and Processing, aspect 1. When collecting data it is understood by moderators that it can be difficult to collect sufficient data (including repeats) within ones own experiment. To that end students are allowed to use class data given the proviso that: The student clearly presents their OWN data or alternatively clearly identifies that which is pooled. The student MUST plan and produce their own data table. ...

Data Collection and Processing, Aspect 3

By Thursday, November 4, 2010 , , , , 0

DCP, aspect 3: Students seem to find this difficult to achieve a 'c'. The aspect is looking for students to correctly present their final answer (to the correct number of significant figures) and to display an uncertainty / error value (to the correct number of significant figures). We will consider each part separately: Firstly, the correct number of significant figures. The student should look back through all the data used in DCP aspect 1. The final answer should have the same number of ...

Data Collection and Presentation, Aspect 2

By Wednesday, November 3, 2010 , , , , 0

Today we will consider DCP, aspect 2. This aspect deals with the processing of the raw data collected in aspect 1. It should involve an 'IB CHEMISTRY type' calculation - it should not be simply calculating averages or calculating 1 / t (for a rate).  The calculation should be demanding enough that an IB Chemist should be able to carry it out (but not another student following another IB subject). If the students carries out the processing of the data correctly, award ...

Data Collection and Processing, aspect 1

By Tuesday, November 2, 2010 , , , , 0

Today, we will move away from Design and consider 'Data Processing and Presentation' (DCP) aspect 1. DCP is all about collecting raw data, displaying it and processing it. DCP aspect 1 deals with correctly and accurately presenting raw data. Data should be put into a table with a title. Any raw data collected can be split into qualitative (an observation - eg, I saw some bubbles) and quantitative (eg, 30.5 oC). Tables of data should contain both quantitative and qualitative observations to achieve a ...