Reddit:

• https://www.reddit.com/r/WGU/comments/hds2gi/wgu_c955_applied_probability_and_statistics/
• https://www.reddit.com/r/WGU/comments/phbgs5/passed_c955_today_tips_inside/

Take the pre-assessment as soon as you start the class. Use it to find your weak points of study and then use the "suggested study" linked from the coaching report to bring you to the topic you struggled on.

Learning how to use your calculator to it's fullest ability is also crucial in making the exam easier on yourself. The TI-84+ is a perfect fit for this.

Youtube will be your best guide, search for 'Center of Math TI-84 Plus Graphing Calculator Guide Playlist'. It'll help a lot.