diff --git a/src/math/Bernstein.js b/src/math/Bernstein.js
index 8cbf7d874..6ba3f5a0c 100644
--- a/src/math/Bernstein.js
+++ b/src/math/Bernstein.js
@@ -7,15 +7,15 @@
 var Factorial = require('./Factorial');
 
 /**
- * [description]
+ * Calculates the Bernstein basis from the three factorial coefficients.
  *
  * @function Phaser.Math.Bernstein
  * @since 3.0.0
  *
- * @param {number} n - [description]
- * @param {number} i - [description]
+ * @param {number} n - The first value.
+ * @param {number} i - The second value.
  *
- * @return {number} [description]
+ * @return {number} The Bernstein basis of Factorial(n) / Factorial(i) / Factorial(n - i)
  */
 var Bernstein = function (n, i)
 {
diff --git a/src/math/CatmullRom.js b/src/math/CatmullRom.js
index 23e850e61..b801833a9 100644
--- a/src/math/CatmullRom.js
+++ b/src/math/CatmullRom.js
@@ -5,16 +5,16 @@
  */
 
 /**
- * Calculates a Catmull-Rom value.
+ * Calculates a Catmull-Rom value from the given points, based on an alpha of 0.5.
  *
  * @function Phaser.Math.CatmullRom
  * @since 3.0.0
  *
- * @param {number} t - [description]
- * @param {number} p0 - [description]
- * @param {number} p1 - [description]
- * @param {number} p2 - [description]
- * @param {number} p3 - [description]
+ * @param {number} t - The amount to interpolate by.
+ * @param {number} p0 - The first control point.
+ * @param {number} p1 - The second control point.
+ * @param {number} p2 - The third control point.
+ * @param {number} p3 - The fourth control point.
  *
  * @return {number} The Catmull-Rom value.
  */
diff --git a/src/math/Matrix3.js b/src/math/Matrix3.js
index 2ef79d9bf..4a3f59fd1 100644
--- a/src/math/Matrix3.js
+++ b/src/math/Matrix3.js
@@ -508,12 +508,12 @@ var Matrix3 = new Class({
     },
 
     /**
-     * [description]
+     * Set the values of this Matrix3 to be normalized from the given Matrix4.
      *
      * @method Phaser.Math.Matrix3#normalFromMat4
      * @since 3.0.0
      *
-     * @param {Phaser.Math.Matrix4} m - [description]
+     * @param {Phaser.Math.Matrix4} m - The Matrix4 to normalize the values from.
      *
      * @return {Phaser.Math.Matrix3} This Matrix3.
      */
diff --git a/src/math/Matrix4.js b/src/math/Matrix4.js
index 066e83403..79494eb49 100644
--- a/src/math/Matrix4.js
+++ b/src/math/Matrix4.js
@@ -559,12 +559,12 @@ var Matrix4 = new Class({
     },
 
     /**
-     * [description]
+     * Multiply the values of this Matrix4 by those given in the `src` argument.
      *
      * @method Phaser.Math.Matrix4#multiplyLocal
      * @since 3.0.0
      *
-     * @param {Phaser.Math.Matrix4} src - [description]
+     * @param {Phaser.Math.Matrix4} src - The source Matrix4 that this Matrix4 is multiplied by.
      *
      * @return {Phaser.Math.Matrix4} This Matrix4.
      */
@@ -1356,9 +1356,9 @@ var Matrix4 = new Class({
      * @method Phaser.Math.Matrix4#yawPitchRoll
      * @since 3.0.0
      *
-     * @param {number} yaw - [description]
-     * @param {number} pitch - [description]
-     * @param {number} roll - [description]
+     * @param {number} yaw - The yaw value.
+     * @param {number} pitch - The pitch value.
+     * @param {number} roll - The roll value.
      *
      * @return {Phaser.Math.Matrix4} This Matrix4.
      */
diff --git a/src/math/Quaternion.js b/src/math/Quaternion.js
index 6da0fa259..c1d33199e 100644
--- a/src/math/Quaternion.js
+++ b/src/math/Quaternion.js
@@ -317,13 +317,13 @@ var Quaternion = new Class({
     },
 
     /**
-     * [description]
+     * Rotates this Quaternion based on the two given vectors.
      *
      * @method Phaser.Math.Quaternion#rotationTo
      * @since 3.0.0
      *
-     * @param {Phaser.Math.Vector3} a - [description]
-     * @param {Phaser.Math.Vector3} b - [description]
+     * @param {Phaser.Math.Vector3} a - The transform rotation vector.
+     * @param {Phaser.Math.Vector3} b - The target rotation vector.
      *
      * @return {Phaser.Math.Quaternion} This Quaternion.
      */