http://etc.usf.edu/clipart/ Free clipart for students & teachers! Welcome to quality educational clipart. Every item comes with a choice of image size and format as well as complete source information for proper citations in school projects. No advertisement-filled pages with pop-up windows or inappropriate links here. A friendly license allows teachers and students to use up to 50 items in a single, non-commercial project without further permission. http://etc.usf.edu/clipart/i/banner.jpg http://etc.usf.edu/clipart/ This website is CoolIris enabled! You can use the CoolIris browser plugin to view the images on this site in an interactive 3D wall.<br><br><br><br> http://www.cooliris.com/ "A tray strewn with dust or sand, used in ancient times for calculating. A contrivance for calculating, consisting of beads or balls strung on wires or rods set in a frame."&mdash;Wright, 1902... http://etc.usf.edu/clipart/14000/14056/abacus_14056.htm "Abacus is a Latin term applied to an apparatus used by the Chinese for facilitating arithmetical operations, consisting of a number of parallel cords or wires, upon which balls or beads are strung, t... http://etc.usf.edu/clipart/14800/14805/abacus_14805.htm An instrument for performing arithmetical calculations by means of sliding balls or counters.... http://etc.usf.edu/clipart/19600/19626/abacus_19626.htm A Chinese abacus used to calculate numbers.... http://etc.usf.edu/clipart/50100/50136/50136_abacus.htm Two Chinese men use the abacus to calculate for their business. "The abacus was one of the earliest aids to calculation." -Hill, 1921... http://etc.usf.edu/clipart/72700/72762/72762_china_abacus.htm An illustration of a balance scale.... http://etc.usf.edu/clipart/73300/73373/73373_balance.htm A container used to measure a bushel.... http://etc.usf.edu/clipart/13100/13150/bushel_13150.htm The bushel, a unit of dry measure.... http://etc.usf.edu/clipart/52000/52078/52078_bushel.htm Dry measure, Bushel basket... http://etc.usf.edu/clipart/3800/3870/basket_1.htm An illustration of a Winchester bushel measuring container. A bushel is a unit of dry volume, usually subdivided into eight local gallons in the systems of Imperial units and U.S. customary units. It... http://etc.usf.edu/clipart/58100/58150/58150_bushel.htm An aluminum set of disks that correctly finds the time needed to develop photos in solution... http://etc.usf.edu/clipart/32400/32402/_32402.htm A caliper used for measuring the diameter of a circle.... http://etc.usf.edu/clipart/46400/46447/46447_caliper.htm "To find the number of bushels of grain in a bin or box, multiply the length in feet by the height in feet, then by the width in feet and then by 8. For instance. In a bin 10 feet long, 6 feet high an... http://etc.usf.edu/clipart/49900/49982/49982_capacity.htm Illustration comparing the fundamental units of measure quart and liter.... http://etc.usf.edu/clipart/51900/51900/51900_capacity.htm A chondrometer is a measuring tool used for weighing seed.... http://etc.usf.edu/clipart/46400/46439/46439_chondrometer.htm This chart of comparisons can be used with the following questions: "Which line is twice B? Which two added make H? Which line is the difference between F and D? Call A 5; name the others. Call A 6, a... http://etc.usf.edu/clipart/50100/50180/50180_comp_chart.htm This diagram represents a student's thinking and progress in math. The image on the left is concrete thinking, counting each dot. The right is symbolic thinking, a digit represents the number of dots.... http://etc.usf.edu/clipart/50100/50161/50161_conc_symbol.htm Illustration comparing the fundamental units of measure 1 cubic yard and 1 cubic meter.... http://etc.usf.edu/clipart/51800/51899/51899_unitmeascub.htm An illustration of calculating the density of a liquid.... http://etc.usf.edu/clipart/58400/58467/58467_density.htm Hairspring dividers are for creating bisectors of circles. They are similar to a compass, but with two points and no pencil.... http://etc.usf.edu/clipart/32400/32409/_32409.htm Containers of dry measure in comparison: one bushel, peck, one half bushel, and one half peck. Illustration also shows liquid measures of quart and pint for comparison.... http://etc.usf.edu/clipart/50100/50195/50195_dry_meas.htm A small electric meter that measures electricity in units called kilowatts-hour. The first meter is in the thousands place and points to 3, the hundreds place points to 6, and the tens place points t... http://etc.usf.edu/clipart/51400/51447/51447_elec_meter.htm A function machine template with room to enter the function, input, and output.... http://etc.usf.edu/clipart/41800/41849/function_41849.htm An illustration of the imperial standard gallon in 1824.... http://etc.usf.edu/clipart/58100/58144/58144_gallon-1824.htm A gas meter that measures feet of gas used. The first meter is in the thousands place and points just passed 5, the hundreds place points passed 4, and the tens place points passed 6. The gas meter r... http://etc.usf.edu/clipart/51400/51452/51452_gas_meter.htm