WAIL: to measure mass and weight
Success Criteria: I can say which is light/heavy/lighter/heavier/heaviest/lightest.
WAIL: To use non-standard units of measure to measure mass
Success Criteria: I can measure mass using non-standard units
WAIL: to measure mass
Success Criteria: I can create my own scales to measure mass
WAIL: To compare mass
Success Criteria: I can compare the mass of different objects
WAIL: To compare mass
Success Criteria: I can compare the mass of different objects