This is an old data visualisation, which is still used in our Study Skills lecture for first year students…
Terms 1 and 2 are 10 weeks long and Term 3 is 6 weeks of teaching, followed by a revision period and then exams.
This graph provides the answer.
How much students access online learning material is not the only factor; when is also important.
(Also, what they do with the material is important, but that’s not shown in this image.)