Fractions of an inch to MM. Always handy. Might be handy to print off and keep around actually
Visual Metric Conversion Charts
From John Mol More
2nd math fractions
Wood sizing chart. Did you know a 2x4 is actually a 1 1/2" x 3 1/2"? --Yep...and a lot of other ACTUAL sizes. *Plus the metric conversion for each.
FREE Printable Fraction Flowers - what a fun way for visualize fractions (math, math activity, 2nd grade, 3rd grade, 4th grade, 1st grade)
Fractions to Decimal chart... Handy for placing guides in Photoshop
Home Made Pantograph Reducer or Enlarger of drawings.
physics formulas - Google Search