**Thursday, March 23rd, 2017**:
We have a new lesson, called

The Inverse of a Matrix.

**Monday, March 20th, 2017**:

We have a new video, called The Multiplicative Inverse of a Matrix.

**Saturday, March 18th, 2017**:

We have a new quiz, called Law of Sines: Ambiguous Case (SSA).

**Thursday, March 16th, 2017**:

We have a new quiz, called The Unit Circle: Angles.

**Tuesday, March 14th, 2017**:

We have a new quiz, called The Unit Circle: Ratios.

**Saturday, March 11th, 2017**:

We have a new quiz, called Vectors: Horizontal and Vertical Components.

**Thursday, March 9th, 2017**:

We have a new quiz, called Counting: Town Maps and Grids Problems.

**Tuesday, March 7th, 2017**:

We have a new quiz, called Counting: Scrambled Letters Problems.

**Monday, March 6th, 2017**:

We have a new quiz, called Counting: Bookshelf Problems.

**Wednesday, March 1st, 2017**:

We have a new quiz, called Counting: Seating People Problems.

**Tuesday, February 28th, 2017**:

We have a new lesson, called Solving Trigonometric Equations. It houses two very important videos that we made last year.

Also, our lesson on Factoring Polynomials (formerly called Factoring Quadratic Trinomials) was overhauled.

**Sunday, February 26th, 2017**:

We have a new video, called Counting: Card Deck Problems.

**Saturday, February 25th, 2017**:

We have a new video, called Probability: Marble Bag Problems.

**Tuesday, February 21st, 2017**:

We have a new video, called Probability of Rolling Dice.

**Saturday, February 18th, 2017**:

We have a new video, called Law of Sines: Ambiguous Case (SSA).

**Wednesday, February 15th, 2017**:

We have a new video, called Counting: Election Problems.

**Monday, February 13th, 2017**:

We have a new video, called Counting: Number of Possible Paths on a Grid (Map).

**Saturday, February 11th, 2017**:

We have a new video, called Counting: Books on a Shelf Problems.

**Thursday, February 9th, 2017**:

We have a new video, called Counting: Seating People Problems.

**Tuesday, February 7th, 2017**:

We have a new video, called Counting: Scrambled Letters, Numbers, Objects.

**Monday, February 6th, 2017**:

We have a new video, called Verifying Trigonometric Identities.

**Saturday, February 4th, 2017**:

We have a new video, called Counting: Horse Problems.

**Thursday, February 2nd, 2017**:

We have a new video, called Counting: Tickets Problems.

**Tueday, January 31st, 2017**:

We have a new video, called The Fundamental Counting Principle: License Plate Problems.

**Monday, January 30th, 2017**:

We have a new video, called The Fundamental Counting Principle: Clothes Problems.

**Saturday, January 28th, 2017**:

All of our trigonometry lessons, quizzes, and videos have been lumped together within their own section on our Lessons page.

**Sunday, January 15th, 2017**:

A quiz called Graphs of Sinusoids to Equations was remastered.

**Friday, January 13th, 2017**:

A quiz called Three Step Equations: Type 2 was remastered.

**Wednesday, January 11th, 2017**:

The quiz called Three Step Equations: Type 1 was remastered.

Also, adjustments were made to the lessons page. A link was missing to a quiz, called Area of a Regular Polygon.