Work with Length http://www.funbrain.com/measure/
Reading a Triple Beam Balance http://www.ohaus.com/products/education/weblab/TBBentry.html
More mass practice http://www.openschool.bc.ca/features/images/sc8/triple_balance_demo.swf
Reading/Filling a graduated cylinder http://www.standards.dfes.gov.uk/primary/teachingresources/mathematics/nns_itps/measuring_cylinder/num_itp_measuringCylinder1_2.swf
Volume info http://www.class.com/demo/hisd_science_level2/semesterA/1.4/virtual_vol.swf
Metric System in General http://www.sd84.k12.id.us/SHS/departments/Science/martz/2006_FSem1/a-Chemistry/ChemFlash/Measuring&Metric.swf
Explanation of the scientific method http://www.sciencebuddies.org/science-fair-projects/project_scientific_method.shtml
reading scales http://www.teacherled.com/resources/readingscales/scalesload.html
Download and play science pirates. http://sciencepirates.com/download.html