Combinations Lesson C(n,r) Notes, Practice Worksheet, and Application Problems Looking for a clear and engaging way to teach combinations (nCr)? This resource walks students step-by-step from understanding when order does NOT matter to confidently solving combination problems using the formula. Perfect for Algebra 2, Probability & Statistics, or Precalculus, this lesson builds both conceptual understanding and procedural fluency—without overwhelming students. Why Teachers Love This Resource ✔ St