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recently led a Google Docs session at Whittier Christian High School and was asked to provide a quick demo video illustrating the way I used formulas (and in particular the IF formula) to grade a quiz made using a Google Form. Apparently my explanation plays well face-to-face but considerably less well from memory. ;) For this video I cut right to the chase and did my best to explain the IF formula for beginners… while keeping under a 5 minute time limit. I hope it's helpful for you and your colleagues and I hope you'll let me know what you think.

In this unit, students will investigate a relationship between recursive functions and exponential functions. Math Content By the end of this unit, students will: Represent data using tables, graphs and rules Investigate patterns and make conjectures Express sequences with recursive and exponential rules Describe and interpret exponential functions that fit the patterns Individual Lessons Lesson 1 - Trains, Fibonacci, and Recursive Patterns In this lesson, students will use Cuisenaire Rods to build trains of different lengths and investigate patterns. Students will use tables to create graphs, define recursive functions, and approximate exponential formulas to describe the patterns. Lesson 2 - More Trains In this lesson, students will use Cuisenaire Rods to build trains of different lengths and investigate patterns. Students will use tables to create graphs, define recursive functions, and approximate exponential formulas to describe the patterns. Lesson 3 - Recursive and Exponential Rules In this lesson make connections between exponential functions and recursive rules. Students will use tables to create graphs, define recursive rules and find exponential formulas.

s a software tool for detecting equations and hidden mathematical relationships in your data. Its primary goal is to identify the simplest mathematical formulas which could describe the underlying mechanisms that produced the data. Eureqa is free to download and use.

Math videos to help explain skills/concepts. Tends to be very skill based, but offers multiple takes on the same skill so if a students doesn't get it from one person the next might be a better fit, short videos makes it plausible that a student might use, GREAT integration of vocabulary. Well worth incorporating into classroom practice to help students understand how to use formulas or manipulate equations. Also they are GREAT models if you want kids to create their own.

A simulation of the stock market. A great running application to use in algebra classes, as it allows students to use algebraic concepts to manage their portfolio. Not directly skill or concept related, but can utilize graphing, formula use (as simple as P/E ratio, to regression analysis, to derivatives). For those teachers who think a little outside the box. I would be glad to hear how others might envision using this in their classroom.