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Tag: algebra

  • Why hundreds of Fairfax Co. elementary schoolers are taking high school math this year – WTOP News

    Hundreds of sixth graders are enrolled in an Algebra I class, a high school course Fairfax County Public Schools is expanding access to through a pilot program this year.

    After students eagerly entered Amanda Blevins’ classroom at Mosaic Elementary on Thursday afternoon, she returned a graded assignment and then shifted their attention to a series of warmup problems projected in the front of the room.

    The sequence tested students’ knowledge of exponents and order of operations. Blevins called on several students to walk her through how to approach each step and determine a final result.

    Then, Blevins tasked students with roaming the room, solving problems on neon sheets of printer paper attached to the classroom walls. At the same time, she worked with small groups using white boards and erasable markers.

    Blevins has 23 sixth graders enrolled in her Algebra I class, a high school course Fairfax County Public Schools is expanding access to through a pilot program this year. Across the county, there are over 700 sixth graders enrolled.

    “They’re taking several years ahead, which is great, because a lot of them have expressed interest in STEM careers later down the line,” Blevins said. “Getting a head start on some of these higher level math concepts sets them on a path to advanced math as they get into middle school and high school.”

    The pilot program is available for students who took the sixth grade Virginia Standards of Learning math test while in fifth grade and earned a “Pass Advanced” score, while also earning certain scores on other math tests.

    In other school years, about 30 students across all 142 elementary campuses took Algebra I in the sixth grade. It was rare, largely because county middle school campuses largely include only seventh and eighth graders.

    Now, over one-third of the district’s elementary schools are a part of the pilot program.

    “I was really excited and I was kind of worried,” student Mason Lee said. “Because it’s like a high school program, but I’m only in elementary school. I was worried that maybe I wouldn’t do so well as I’d done before, but I’ve been able to keep up pretty well so far.”

    The class, Lee said, “could help me get into maybe a good college.”

    Blevins said the biggest obstacle is helping students fill in gaps that could be caused by skipping two levels of math.

    “We’ve been front-loading a lot of the seventh and eighth grade concepts, and we’re trying to sprinkle that in as we get into the Algebra units too,” Blevins said.

    Yesaswini Perneti Mohan, meanwhile, expressed interest in the class because she found previous math courses to be “really easy.” She said she wants to become a neurosurgeon, and described the class as “what I expected. It’s not that easy or hard. It’s in the middle range.”

    Gavin Wang is an aspiring mathematician, and said whenever he can, “I try to do something that involves harder math.”

    Offering the course was a “heavy lift,” Principal Mahri Aste said, and some parents were nervous about their kids taking a high school course in sixth grade.

    But, Aste said, “it’s been very, very positive. The kids are excited about math. They love it.”

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    Scott Gelman

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  • What Is a Function in Algebra? | Khan Academy Blog

    What Is a Function in Algebra? | Khan Academy Blog

    What is a function?

    I’m sure that many of you have heard the term “function” in math class before. But, if you’re anything like me, you might be thinking “What the heck is a function, anyway?”

    Simply put, a function is a rule that connects one set of numbers to another set of numbers. It’s kind of like a translator for math. For example, if you have the function f(x) = 2x, this rule is telling you that for any number you input (x), you multiply it by 2 to get your output (f(x)).

    Functions can get a lot more complicated than that, of course. Sometimes they involve fractions, exponents, square roots, and all sorts of other funky math symbols. But at the end of the day, they’re all just rules that tell you how to take one set of numbers and turn it into another set of numbers.

    So next time your math teacher asks you to find the value of a function, just remember: it’s not as scary as it sounds. It’s just like following a recipe, except instead of ending up with a tasty cake, you end up with a bunch of numbers. Yum?

    Want to Learn Algebra for Free?

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    Jeremy Schifeling

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  • What Is Linear Algebra? | Khan Academy Blog

    What Is Linear Algebra? | Khan Academy Blog

    What is linear algebra?

    What is linear algebra? Well, if you’re like most people, you might think it’s just another boring math subject you thankfully avoided in school. But trust us, it’s a little more interesting than that!

    Linear algebra is essentially the study of mathematical structures that can be defined in terms of linear equations. So, in a nutshell, it’s all about lines. Think of it as the cooler, more sophisticated cousin of geometry.

    What do you do in linear algebra?

    But what do you actually do in linear algebra? Well, you might work with things like vectors, matrices, and tensors, and use different operations to manipulate them. For example, you could multiply two matrices together, or find the inverse of a matrix.

    Why is linear algebra important?

    Now, you might be wondering: why would anyone want to study this stuff? Linear algebra is actually pretty important in a lot of fields. For example, it’s used in computer graphics to help render 3D images, and in data science to build machine learning models.

    So next time someone asks you what linear algebra is, you can give them the lowdown. Or, if you want to sound really smart, just tell them it’s the study of vector spaces and linear mappings between them. That should do the trick.

    Want to Learn Linear Algebra for Free?

    Khan Academy has hundreds of lessons for free. No ads, no subscriptions.

    Jeremy Schifeling

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  • Who Invented Algebra? | Khan Academy Blog

    Who Invented Algebra? | Khan Academy Blog

    It’s the question that haunts every student who’s ever stared blankly at a jumble of letters and numbers, wondering how on earth they’re supposed to make sense of it all: Who invented algebra?

    The answer isn’t simple. The earliest recorded evidence of algebra comes from the ancient Babylonians, who had their own algebraic system as early as 1900 BC. But other ancient civilizations such as the Egyptians, Greeks, and Chinese also had methods for solving equations that bear similarities to modern algebra.

    It wasn’t until the medieval Islamic world, however, that algebra really started to take shape as we know it today. Mathematician and scholar Al-Khwarizmi is often credited as the “father of algebra” for his work in the 9th century. He wrote a book called “The Compendious Book on Calculation by Completion and Balancing” (rolls right off the tongue, doesn’t it?) that laid out the basic principles of algebra and popularized the use of symbols and letters to represent unknown quantities.

    So the next time you’re stuck on a particularly gnarly algebra problem, don’t just curse your teacher – you’ve got thousands of years of history to blame, too… 🙂

    Want to Learn Algebra for Free?

    Khan Academy has hundreds of lessons for free. No ads, no subscriptions.

    Jeremy Schifeling

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