A fantastic collection of revision  material – notes are also available for download from the youtube link.

SL Algebra Revision:

SL Functions Revision:

SL Trigonometry Revision:

SL Vectors Revision (Matrices no longer on the syllabus so ignore this and skip straight to around 23 mins)

SL Probability and Statistics Revision:

SL Calculus Review part 1:

SL Calculus Review part 2:

SL GDC Calculator skills for Paper 2 Using Ti-84: