# June 2011 Archives

## Introducing Thinkwell Referral Rewards!

Here at Thinkwell, we make multimedia textbooks that our customers are proud to recommend to everyone they know. We love when you spread the word about Thinkwell, and we want to give a little something back to you when you do. That's why we're introducing Thinkwell Referral Rewards.

Thinkwell Referral Rewards allows current Thinkwell subscribers to earn \$25 Amazon gift cards by recommending their friends and family. Friends and family receive \$10 off all 12-month subscriptions at the time of purchase, and the current subscriber receives a \$25 gift card for each subscription.

That's right. All the new subscriber has to do for a \$10 discount is type the referrer's email address in at checkout--and the referrer gets a \$25 Amazon gift card! So go tell your friends and family (and neighbors and coworkers and dog-groomers) about how much you love Thinkwell. You'll be glad you did.

## Free Worksheet on Algebraic Proofs

Did you enjoy yesterday's video on algebraic proofs? Do you want to see if you remember everything from the lectures? Check out today's free Geometry worksheet covering the Algebraic Proofs video. It's two pages of word problems and equations in which you'll need to justify each step you take on your way to the solution. Don't forget the different properties of equality and congruence, as you'll be asked to identify them in a few examples.

In addition to videos and worksheets, students in our courses get interactive activities, notes, transcripts of all the lectures, quizzes, and tests. No stone is left unturned when it comes to ensuring you grasp the fundamentals of the course you take. So click on the worksheet below (PDF) and see what you think!

## Algebraic Proofs

It's very important to be able to prove the truth of statements in mathematics, especially in your own work. It not only helps you calculate the right answer by checking your work along the way, but also explains why we go through a series of steps to solve a problem. That's why today's free Geometry video on algebraic proofs is so useful--and will continue to be useful as you progress to more difficult mathematical subjects. In this video, Professor Burger shows you how to go about justifying each step in solving an equation.  He also uses a word problem to reinforce the importance of clear mathematical proofs. You get to see each step in the problem's solution and practice determining the justifications for each step. In the fourth lecture, Professor Burger identifies different properties of equality and congruence, which is essential to verifying mathematical statements. It might seem tedious, but proofs are at the heart of all mathematics.

Don't forget to click the forward button to the left of the time stamp to catch all four lectures on today's video. We'll have a worksheet for you tomorrow to check your knowledge on algebraic proofs.

## Summer Doesn't Mean Learning is Over

This summer, many of you are shutting down your homeschool and taking a break. You earned it, your kids earned it, and honestly, a break can revitalize and inspire both you and your children when you start back up. However, the beauty of homeschooling is that you're never finished learning, and anything can turn into an educational opportunity.

Many of you may be travelling around the globe this summer. Travel is one of the biggest opportunities to learn out there! Whether it's another culture, a historical location, or maybe just another city, there is a wealth of learning adventures you and your children can encounter. Travelling to Paris was one of the most amazing cultural experiences I have ever had. I got to see famous works of art I had only read about, peer out over the city from the top of the Eiffel Tower, and make my way around town on the Metro, the subway system in Paris. At one point, we were even seated with strangers at a restaurant, where we proceeded to discuss our countries and the differences between the two. It was an amazing evening, and it gave me the chance to see things through a stranger's eyes. Travelling opens you up to new experiences that you might otherwise never enjoy. And think of how exciting it is for kids whose views of the world tend to be more centralized.

Or maybe you'll explore your own town like a tourist. This can often be a great experience. Check out the local museums, find and use the outdoor hike and bike trails, or wander historic areas and learn what makes them so special. It's easy to forget about all the fun things available to you in your city, and now is the time to embrace them! Look for interesting exhibits and day trips that can show your children why you live where you do. Find free splash parks, great playscapes, or seek out the free Shakespeare in the Park performances your city may offer. It's not necessary to spend a lot of money to have a fun day on the town.

Additionally, check out the local community colleges, theaters, or museums to see if they offer kids' classes. You can either take a class with your child so you can experience learning together, or take a well-deserved break and let them explore crafting on their own. Either way, you both win. Growing up, I had the benefit of taking interesting art courses with my mom during summers. Together we took a stained-glass class that helped us bond and taught us an interesting craft. The experience resulted in both of us developing a passion for taking arts classes, and we both still do.

This is just the tip of the iceberg of ideas--and part of the reason why homeschooling is so great. Education never stops, and I'm certain many of you have great plans for how you'll continue education this summer without cracking the books. Share them with us in the comments section. We hope you have a great summer of learning!

## Coordinate and Transformation Tools - Free Worksheet

Did you catch both of the videos we posted on the blog this week? If not, go check out the posts: Using Formulas in Geometry and Geometry-Transformations in the Coordinate Plane. Today we're sharing a free Geometry worksheet covering the subsection on Coordinate and Transformation Tools. You'll want to understand the information from both videos before you use this worksheet to see how much knowledge you retained.

While the worksheet covers 3 videos, we didn't share the second video on Midpoint and Distance on the Coordinate Plane. However, fear not because the free worksheet is labeled so you can either omit the questions from the section you haven't seen or try to solve them despite not having reviewed the information. Either way, this worksheet is a great example of one of many ways students can review the important concepts from lectures to ensure they have a solid grasp on the subject. While we also include interactive activities, quizzes, tests, notes and other helpful learning aids, the worksheets are great because you can print them and complete them anywhere at anytime.

## Geometry - Transformations in the Coordinate Plane

In today's free Geometry video, we're taking a look at Transformations in the Coordinate Plane. A transformation is a change in the position, size, or shape of a figure. The original figure in a transformation is called the preimage and the resulting figure is called the image. Possible transformations include reflections, rotations, and translations. In the first lecture, Professor Burger teaches the basics for each type of transformation and how to use arrow notation to describe the transformation. In the second lecture, he uses a problem to show how to draw and then identify a reflection in the coordinate plane. The lesson continues in the third lecture where you will learn how to draw and recognize a translation, where all points of a figure move the same distance in the same direction. And finally, in the fourth lecture, Professor Burger uses an example of a tile pattern to show Geometry in action in a real world application.

Transformations are often used in art, which makes it a very interesting subject. Catch all four lectures on the video by clicking the forward button to the left of the time stamp.