Lesson Plan
Google

Google for Education: Measuring Complexity of Function or Algorithm

For Teachers 9th - 10th Standards
In this lesson, students learn how to measure the complexity of the function or algorithm in a math problem and understand how this applies to real world situations.
Unknown Type
Other

Project Happy Child: Free Subtraction Worksheets

For Teachers Pre-K - 1st Standards
2000 basic subtraction worksheets are available at this web site. They can be printed and used for a variety of practice purposes. Some helpful hints are included to avoid mindless practice that could quickly become counter productive.
Activity
Texas Instruments

Texas Instruments: Mad Minutes

For Teachers 9th - 10th
This activity should help kids to perform quick computations using mental math, become less reliant on calculators for computation, and remember algorithms for common math problems by using repetition and practice.
Unknown Type
Quia

Quia: Multiplication Madness

For Students 3rd - 8th Standards
In this interactive website put twenty multiplication problems in order according to the increasing value of their products.
Lesson Plan
Other

Ohio Department of Education: Models for Dividing Fractions [Pdf]

For Teachers 5th - 6th Standards
This resource consists of a detailed, hands-on lesson plan for dividing fractions using manipulatives such as fraction bars.