Jonathan Hall has many excellent Tools for Maths Teachers. Here you will find various tools including Starters and also a bank of GCSE questions.
The illustration shows an example from Differentiated Questions; these have an oprional timer.
The GCSE questions bank is really useful; note the choices of topic. It is also possible to choose Foundation or Higher or both and Calculator or Non-Calculator. You have the option to show solutions.
This site has been added to the Collections and Revision pages.
Mathematics - Starters and Plenaries 