MEI, AQA, Edexcel and OCR (also Eduqas, part of WJEC) provide excellent support for teachers. With GCSE and A Level subject content now the same for all the examination boards, we have an excellent library of resources to use irrespective of the specification chosen for public examinations.
(See also 16+ Resources.)

MEI has produced such a valuable collection for teachers with the latest addition to their work on Problem Solving. See their Problem Solving examples and solutions. As well as all the problems and solutions with very valuable suggestions and commentary, MEI has provided a guide to support teachers with the problem-solving content of GCSE (14-16) and A Level (16-18). See also the result of the collaboration between MEI and the Institution of Engineering and Technology (IET); a wonderful set of maths resources is available.

MEI – IET Project Resources

At A level MEI’s Interactive Scheme of work includes a resource for each section of the course. See also, MEI on integrating technology into your scheme of work which includes many calculator, Desmos and GeoGebra tasks.

See also MEI Free Reources and a page added to the GeoGebra series on the MEI GeoGebra Institute.

AQA

• AQA All About Maths – many excellent resources for teachers who offer, or are considering offering AQA maths qualifications. The resources include KS3 (11-14) tests, many resources for GCSE and the A Level section includes very useful topic tests.
• AQA Bridging the Gap excellent resources, useful too for ideas to teach KS3.
• Teachit Maths (part of the AQA family) though a subscription site offers its entire collection of activities as pdfs free. I have found many high-quality resources here for all ages. Look at this activity on quadratic functions for example – this should really help understanding.
• TeachIt Maths (KS5)
• From AQA comes an outstanding resource, GCSE Mathematics: 90 maths problem  solving questions.Em  @EJmaths has a brilliant PowerPoint with all the questions and answers – see it here.
  

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• AQA A Level Teaching Resources  (note resources on TeachIt Maths, KS5)        

TeachIt Maths

Edexcel

• GCSE Teacher Support includes new content resources, a worksheet collection for Foundation and Higher, teaching low attainers and formulae posters.
  

  Edexcel Worksheets

• Teaching and Learning Materials includes an extensive collection from baseline tests for younger (KS3, age 11-14) students to demanding GCSE (age 14-16) Problem Solving questions. The Problem Solving questions with full mark schemes are excellent as are the Practice Papers and topic tests.
• Teaching and Learning Materials – A Level 16+ a wonderful and growing collection
• Signing up for the wonderful Mathematics Emporium is highly recommended, note that it is a free website intended for the use of teachers of mathematics in secondary schools, regardless of what board you use. Register for an account and ensure you supply a correct centre e-mail address in your name for verification, your centre name and centre number.

• In the GCE AS/A Level Mathematics cabinet, you will find documents for GCE 2017 including baseline tests and unit tests, also Transition materials for GCSE to A Level.

OCR

• GCSE Planning and Teaching documents
• GCSE Check In Tests & more 
  
  

  OCR GCSE 9-1 Check in tests

• A Level – Check In Tests and more
• Bridging the gap between GCSE and AS/A Level Mathematics – A Student Guide.
  This is quite simply an outstanding resource for students (and their teachers!). Many exercises are provided and the answers are all at the back. OCR have very helpfully provided the document as a Word document.

Statistics – The large data sets and more for Advanced Level Statistics from AQA, Edexcel, OCR and OCR (MEI) can be found on this page.

Eduqas is part of WJEC and offers Ofqual reformed qualifications to secondary schools and colleges. Eduqas has many very useful secondary and vocational resources for Mathematics. Note the series of resources for topics added to current the GCSE specification.