IB Biology HL Internal Assessment Example

The student placed the investigation in a relevant biological context and showed a clear link between ripening and changes in banana composition.

The student identified important variables and included several practical controls and repeat trials.

The student provided enough procedural detail that much of the investigation could be followed by another student.

Some of the scientific explanation is inaccurate or oversimplified, which weakens the precision of the research context.

The dependent variable is still not operationalized tightly enough, so the investigation relies too much on subjective visual judgement.

Several methodological choices are described but not fully justified in terms of how they ensure sufficient and relevant data.

The student recorded and organized the data clearly enough that the main pattern can be followed across ripeness levels.

The student included means, standard deviations, a graph, and a statistical test, which shows good effort to process the results systematically.

The student showed awareness of uncertainty rather than presenting the measurements as exact.

The uncertainty treatment is not always precise or consistently presented, especially in the way it is calculated and reported.

Some of the data, especially the glucose-strip results, are not informative enough to test the intended trend because they hit the method’s ceiling.

The statistical analysis does not fully match the structure of the full dataset, and some parts of the presentation reduce clarity.