And the growth of model answers on the internet has increased concerns.
In many subjects, coursework is typically worth between 25% and 40% of marks.
I will then calculate each of these manually and compare the answers.
Next I did the same thing for hexagons and found another set of formulae, I then compared the formulae for squares and the formulae for hexagons to see if there were any connections between them.
The Association of School and College Leaders praised the announcement.
Gcse Mathematics Coursework Tasks
"In the age of the internet, plagiarism represents a real problem and it is right that the regulations on carrying out coursework recognise this," said general secretary Dr John Dunford.
"As a result of the QCA's report, we will be removing all GCSE coursework from maths and stipulating that in other subjects, coursework must be supervised in classroom style conditions.
"Coursework can be very beneficial and I am determined that the hard work of the vast majority of students should not be undermined by questions of validity.
All other GCSE coursework would have to be supervised, Mr Johnson told the Labour party conference on Wednesday. Mr Johnson said qualifications could not be undermined by a few cheats who took their work from the internet.
Parents needed to be reassured that coursework assessed pupils' work in a "fair and robust way".