I have created an Evernote shared notebook with links to some sites which include Mathematics videos. (You do not need an Evernote account to use this notebook, though I strongly recommend it as an outstanding resource for capturing notes / ideas /anything! ). To navigate the notebook simply select the notes on the left, note that the url is given at the top of each note.
For a selection of short videos for the Mathematics Classroom try the Class Clips from BBC Learning Zone. Choose Primary (5-11) or Secondary (11-18) a subject and a topic. Note that each video has several keywords making searching possible.
David Smith’s The Maths Teacher site has a great collection of videos for both GCSE (age 14-16) and A Level (16-18). Transcripts are available for each lesson, also exercises with worked solutions. Many of the GCSE videos would also be useful for younger students. There are also videos and written solutions to some A Level papers.
No post on videos would be complete without mentioning YouTube of course and Sal Kahn’s Khan Academy. A YouTube search on KS3 Algebra (KS3 is age 11-14) for example returns this list and for GeoGebra for example you will find a channel devoted to the software. For an alternative search of Khan Academy try Khan Instant. (Created by Ben Jacobson).
For another extensive collection of videos try these from Patrick JMT.
There are several excellent TED talks on Mathematics, these are all short talks and well worth listening to. See in particular Dan Meyer’s ‘Math class needs a makeover’. To learn more about TED see the ‘About TED‘ page. See also the information on Ted-Ed the new education channel from TED.
mrbarton’s YouTube channel – videos on subjects such as Autograph, Gapminder and Mr Barton’s favourite Mathematics websites.