Videos on Multiplying Fractions

A couple of students in my on-line classes have been asking questions about multiplying fractions.  Should you simplify before or after multiplying?  How should you simplify?  By cross-canceling directly, or by a prime factorization and cross-canceling combo?  Here are some videos I have made to help clarify the situation. View on screencast.com » View on screencast.com » ...
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Twitter Link Round-Up

Here's a recap of the links that I've posted on Twitter over the past week or so: 1.  A friend told me that she used this Divisibility Rocks game from over at The Utah Education Network with her Developmental Math students and that it worked really well.  It turns out that they have plenty of other great lesson plans as well. 2.  Z-Type is a very intense typing game.  It turns out that as a Math Instructor, I do have to teach typing, computer, and writing skills as well.  For example:  One student told me just today that he couldn't write a paper for my class about an African American Mathematician because he hadn't had an English class yet. 3.  NightMare is an example of a 25-word story.  I'm considering having my students write their own 25 word stories about a concept in mathematics.  This would be good introductory video to show to students, though, because it is absolutely hilarious!...
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Math Games for Integers, Multiplication, and Combining Like Terms

I have some slightly under-prepared students semester, so I suggested to them that they should try to work on their basic skills outside of class.  However, this requires me to provide some recommended resources to them, and these are what I have discovered: Multiplication Factoris - Tetris-style game for multiplication facts. Penguin Jump - Fun Multiplication Game that can be played with up to 4 people from around the world. Dad's Worksheets - For those who just want the traditional worksheets to practice with. Combining Like Terms Combining Like Terms Quartet - This like terms game requires you to match the center term with its the appropriate like term.  Matching Game - Identify the matching terms in two columns. On-line Jeopardy Game - Distributive property, combining like terms, evaluating expressions, solving equations.  Integers and Order of Operations Arithmetic Math Man - Pac Man-style game for Order of Operations. Circle 0 Puzzle - adding positive and negative integers to sum to zero. Circle 3 Puzzle - adding positive and negative integers to sum to three. Circle 21 Puzzle - adding positive and negative...
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