diff --git a/README.md b/README.md
index 2634454..7f3c570 100644
--- a/README.md
+++ b/README.md
@@ -189,9 +189,9 @@ Courses | Duration | Effort | Prerequisites
 :-- | :--: | :--: | :--:
 [How to Code - Simple Data](https://www.edx.org/course/how-code-simple-data-ubcx-htc1x) | 7 weeks | 8-10 hours/week | none
 [How to Code - Complex Data](https://www.edx.org/course/how-code-complex-data-ubcx-htc2x) | 6 weeks | 8-10 hours/week | How to Code: Simple Data
-[Programming Languages, Part A](https://www.coursera.org/learn/programming-languages) | 4 weeks | 8-16 hours/week | recommended: Java, C
-[Programming Languages, Part B](https://www.coursera.org/learn/programming-languages-part-b) | 3 weeks | 8-16 hours/week | Programming Languages, Part A
-[Programming Languages, Part C](https://www.coursera.org/learn/programming-languages-part-c) | 3 weeks | 8-16 hours/week | Programming Languages, Part B
+[Programming Languages, Part A](https://www.coursera.org/learn/programming-languages) | 5 weeks | 4-8 hours/week | recommended: Java, C
+[Programming Languages, Part B](https://www.coursera.org/learn/programming-languages-part-b) | 3 weeks | 4-8 hours/week | Programming Languages, Part A
+[Programming Languages, Part C](https://www.coursera.org/learn/programming-languages-part-c) | 3 weeks | 4-8 hours/week | Programming Languages, Part B
 
 ### Math Electives
 **Students must choose one of the following topics**: calculus, linear algebra, logic, or probability.
@@ -201,7 +201,7 @@ Courses | Duration | Effort | Prerequisites
 :-- | :--: | :--: | :--:
 [Calculus 1A: Differentiation](https://www.edx.org/course/calculus-1a-differentiation) | 13 weeks | 6-10 hours/week | [pre-calculus](https://www.futurelearn.com/courses/precalculus)
 [Calculus 1B: Integration](https://www.edx.org/course/calculus-1b-integration) | 13 weeks | 5-10 hours/week | Calculus 1A
-[Calculus 1C: Coordinate Systems & Infinite Series](https://www.edx.org/course/calculus-1c-coordinate-systems-infinite-series) | 13 weeks | 5-10 hours/week | Calculus 1B
+[Calculus 1C: Coordinate Systems & Infinite Series](https://www.edx.org/course/calculus-1c-coordinate-systems-infinite-series) | 6 weeks | 5-10 hours/week | Calculus 1B
 
 #### Linear Algebra
 Courses | Duration | Effort | Prerequisites