Band 5+: The graph shows the number of students who studied online between 2010 and 2020.

The report effectively addresses the task by presenting the main trends and key data points. The overview is clear and accurate, and the data is well-organized into logical paragraphs. Minor lapses include a slight repetition of the school data and a minor inaccuracy in the final sentence (the school figure is described as 80 in 2010, which is correct, but the phrasing could be clearer). Overall, the response is relevant, sufficient, and well-structured. The report falls short of the required 150 words.

The report is logically organized with a clear overall trend statement followed by specific data. The use of cohesive devices is appropriate, and the progression of ideas is easy to follow. However, the final paragraph introduces a slight redundancy by restating the 2010 school figure, which could be integrated more smoothly. Overall, the structure is effective, but a more seamless flow between paragraphs would enhance coherence.

The vocabulary used is appropriate and accurate, with some good range (e.g., 'increased significantly', 'decreased', 'compared with'). However, the report could benefit from more varied and sophisticated lexical choices, such as 'witnessed a substantial rise', 'experienced a decline', or 'the proportion of'. Additionally, the phrase 'studied at school' is repeated, and using synonyms like 'attended traditional schooling' would improve lexical flexibility. Boost vocabulary complexity to elevate the overall score.

The grammar is largely accurate, with a good mix of sentence structures, including complex sentences (e.g., 'By 2015, the figures had changed...'). Punctuation is used correctly. There are no significant errors, but the report could demonstrate a wider range of grammatical structures, such as passive voice or more varied conditional forms, to achieve full flexibility. The final sentence is slightly awkward in its placement, but grammatically correct.