WHY NON-STANDARD UNITS ARE USED?

Here are some reasons for introducing measurement of liquid to children through the use of non-standard units.

*   Materials for non-standard units are easier to obtain;

*   Historically, humans used non-standard unit for measurement before establishing  
    standard units;

*   Non-standard units are easier to use;

*   Non-standard units use materials that seem naturally related to the child's everyday
    experiences;

*   It is good to give children experience with unfamiliar system of measurement just as  
    they might use bases other than ten in numeration;




Here are some materials that can be use as non-standard units to measure volume of liquids.

                     drinking glass

                    mug

                           mineral water bottle