Three marked examples from the IB
Real IAs for the new course, marked by the IB. Marks for each criterion; the maximum is in the heading.
| Example | A /4 | B /4 | C /6 | D /12 | E /4 | Total /30 |
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| School timetable app | 4 | 4 | 5 | 10 | 3 | 26 |
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| Trip packing list | 3 | 3 | 4 | 8 | 4 | 22 |
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| Quiz game | 2 | 2 | 4 | 7 | 2 | 17 |
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Example 1 · School timetable app · 26 out of 30
Did well: A clear problem, a plan linked to every success criterion and well-documented development.
Lost marks:
- C: no design for how the finished timetable would look
- D: the subject list is kept in a separate file outside the program, and the video shows little testing with extreme or invalid data
- E: one success criterion was not fully met, and one suggested improvement was too small to count
Example 2 · Trip packing list · 22 out of 30
Did well: A usable program with commented code; the evaluation earned full marks with three realistic improvements.
Lost marks:
- A: the reason for a computer solution was too general
- B: the plan never mentions the success criteria
- C: diagrams and screen designs were incomplete, and the test plan had no extreme or invalid data
- D: it only said the testing worked, without showing how
Example 3 · Quiz game · 17 out of 30
Did well: A genuine attempt at every section.
Lost marks:
- A: no measurable requirements, and the success criteria did not describe a complete program
- B: the breakdown of the problem was generic
- C: no screen designs
- D: the program only partly worked, quiz questions had to be edited outside it, choices were only outlined and the code had no comments
- E: two of the three improvements did not count (one too small, one was a missing success criterion)
What all three teach- Test with normal, extreme and invalid data, and show those tests in the video
- Write specific success criteria that together describe the whole program
- Keep everything inside the program: no editing files by hand to make it work
- Comment your code and link every section back to the success criteria