This collection of conditional probability problems by NRICH is a definite bookmark. There are over 20 sample problems, many with interactive components and excellent real-world examples. This is a great resource for whole group, small group or individual practice.
Jenny Gage does a great job of making conditional probability relevant to real-world issues and therefore relevant for students. Her examples are powerful and the links to additional resources and example problems are amazing. I would definitely recommend bookmarking this resource.
This infographic uses baseball as a framework to present conditional probabilities. It's awesome because it also includes interesting facts about the history and use of conditional probabilities that can help make the concept relevant to students.
This lesson unit by Mathematics Assessment Resource Service is outstanding! It is not only detailed, but also engaging, hands-on, and includes the resources you need. What makes it awesome, though, is that they included potential challenges students may face with the lesson and suggestions for how to address them!
Kelly Boles presents an excellent video lesson teaching conditional probability. The video is easy to follow and would be appropriate to have students review during class or at home. It's also a great resource to provide to parents. Additionally, the lesson slides are also available as a PowerPoint presentation.
This video makes conditional probability understandable by providing examples of two different strategies to teach this concept. I really like that he compares two of the most popular ways of representing conditional probabilities (tables and Venn diagrams) side-by-side. Additionally, he walks-through several examples step-by-step, allowing the concept to sink in.
This blog post is AMAZING! It uses a step-by-step approach to describe one father's method for teaching his gifted daughter conditional probability. Each step includes diagrams and examples which makes it easy to understand and replicate.
Interactivate provides an engaging and standards-aligned lesson plan for teaching conditional probabilities. Besides the detail, and the fact that the activities are just plain fun, this is an excellent reference because of the additional resources and suggestions for teaching the lesson that are provided.