Zach Korzyk created DeltaMath in 2009 when he wrote a simple program on substituting values into the Quadratic Formula. Positive student response prompted him to kick into gear and create content for the rest of the school year.
FREE Unlimited assignments Unlimited student practice 1800+ premade problem types Autograding Detailed student data, including time-stamps Evidence of student progress/learning Cheat prevention tools Copy and share assignments Google Single Sign-On (SSO)
The name “Open Middle” might sound like a strange name for a website about math problems. However, it references a very specific type of problem we try to encourage here. Most of the problems on this site have:
a “closed beginning” meaning that they all start with the same initial problem.
a “closed end” meaning that they all end with the same answer.
an “open middle” meaning that there are multiple ways to approach and ultimately solve the problem.
Open middle problems generally require a higher Depth of Knowledge than most problems that assess procedural and conceptual understanding. They support the Common Core State Standards and provide students with opportunities for discussing their thinking.
Desmos wants to build a world where every student learns math and loves learning math, where a student’s access to the power and beauty of math doesn't depend on their place of birth, race, ethnicity, gender, or any other aspect of their identity. Our free suite of math software tools, including the renowned Desmos Graphing Calculator and Scientific Calculator, are used annually by over 40 million teachers and students around the world. Our tools power core math curricula for many of the world’s largest publishers, and our calculators are built into the majority of U.S. state-level assessments and digital college entrance exams. Desmos is also partnered with the Smarter Balanced Assessment Consortium, the International Baccalaureate MYP, and NWEA (view the full list of assessments here). Our cutting-edge technology also powers our free digital classroom activities, thoughtfully designed by teachers for teachers to support and celebrate the different ways students come to know mathematics. These activities are guided by our pedagogical philosophy and open up a world of possibilities for students to explore concepts more deeply, collaborate with their peers on problem-solving, and apply knowledge creatively as mathematicians.