Our own Spiremaths Interactives on Probability are great for KS3, though they cannot be used on iPads or iPhones.
Improving Learning in Mathematics
There are 4 Improving Learning in Mathematics Lessons: S1 Ordering Probabilities; S2 Evaluating Probability Statements; S3 Probability; and S8 Using Binomial Probabilities – flipcharts and files etc found here.
BBC Bitesize: Probability and Relative Frequency
Relative frequency resource – here (with revision and test).
Resourceaholic Resources (Jo Morgan’s brilliant site)
Probability; Probability Trees; Frequency Trees; Venn Diagrams for Probability
Median Resources (Don Steward’s brilliant site)
His probability resources are found here.
Inquiry Maths (Andrew Blair’s brilliant site)
Inquiry maths prompt for Probability is found here.