In This Issue
Beyond Crossroads
Explaining Logarithms
Zoom Algebra


Beyond Crossroads
http://www.bc.amatyc.org/
The American Mathematical Association of TwoYear Colleges (AMATYC) recently released Beyond Crossroads. This site provides access to the individual chapters of the Standards in HTML or PDF format. In addition there are links to resources that illustrate the ideas in the document.
The chapters include:
 Shaping the Vision
 Guiding Principles
 Implementation Standards of Beyond Crossroads
 Student Learning and the Learning Environment
 Assessment of Student Learning
 Curriculum and Program Development
 Instruction
 Professionalism
 Involvement of Stakeholders in Implementation
 Moving from Vision to Reality
Explaining Logarithms
A Progression of Ideas Illuminating an Important Mathematical Concept
http://www.mathlogarithms.com/
Dan Umbarger wrote the book "Explaining Logarithms" when he realized that students have a "knowledge gap" regarding logarithms. This companion site is organized into the following sections:
 Download the Book in PDF Format
 Why I Wrote this Math Book
 Philosophy Driving the Text
 Teacher Comments
 Order Multiple Bound Copies
 Make a Donation
 Contact Me
 Errata
Umbarger notes that there are three potential audiences for his material:
 students who have never studied logarithms
 students who have studied logarithms but who did not master the concepts or have forgotten key ideas
 students preparing for calculus
Zoom Algebra  Zoom Math
http://www.zoommath.com/
Zoom Algebra, an application from Zoom Math with an intuitive visual interface and numerous typing shortcuts, is software for TI83 Plus or TI84 Plus graphing calculators. The authors explain that it lets you "type problems in just the way they look in your textbook, and then they look just right on your calculator screen."
Download a demo or purchase this software that:
 combines like terms
 simplifies exponential expressions
 distributes and "FOILs"
 adds, subtracts, multiplies and divides fractions containing variables
 simplifies square roots
 substitutes out known variables
 solves equations for specific variables
 solves systems of linear equations
 adds arithmetic sequences
 factors polynomials
 solves complicated fraction problems that involve factoring
 solves quadratic equations
 displays each solution step


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