D-first neutral own job · staff judgement
Actual source reading may familiarise the paper scene neutrally. Record actual instruction/support and teach before using a component. Later is a new offer after a real teaching interval; no universal familiarity or progress is claimed.
Whole neutral source
Fictional label quantities: First bundle comparison. First card: 507 labels. Second card: 570 labels. Third card: 470 labels. All three count the same kind of label; these are supplied counts, not actual stock or money. The supplied alternative first-card model is 4 hundreds, 10 tens and 7 ones. One hundred has the value of ten tens; one ten has the value of ten ones. A helper says: “The first alternative has value 417.” Use the whole values to represent, compare or order them. Own responses remain open.
D-first-Q1
Use the complete supplied alternative first-card model to find and represent its whole quantity. Explain why its grouping keeps that value.
Criterion
The full model [4, 10, 7] gives 507; ten of its tens replace one hundred without adding or losing value. A valid complete equivalent model is accepted.
After-own staff possibility
4 hundreds + 10 tens + 7 ones = 400 + 100 + 7 = 507; 507 = 5 hundreds + 0 tens + 7 ones = 500 + 0 + 7.
Teach this relationship, check actual opportunity and receive own words before staff models. Later requires a real teaching interval, not a day label.
D-first-Q2
Compare the first and second full quantities. Which is greater? Give a place-value reason.
Criterion
Correctly compares 507 and 570, reporting 570 as greater and explaining the highest place where their values differ.
After-own staff possibility
570 is greater; 507 = 5 hundreds + 0 tens + 7 ones = 500 + 0 + 7. 570 = 5 hundreds + 7 tens + 0 ones = 500 + 70 + 0.
Teach this relationship, check actual opportunity and receive own words before staff models. Later requires a real teaching interval, not a day label.
D-first-Q3
Order all three stated quantities from least to greatest and show a checking reason.
Criterion
Orders 470, 507, 570 using full values, with a place-value or correctly placed number-line check; units remain labels.
After-own staff possibility
470, 507, 570; 470 = 4 hundreds + 7 tens + 0 ones = 400 + 70 + 0. 507 = 5 hundreds + 0 tens + 7 ones = 500 + 0 + 7. 570 = 5 hundreds + 7 tens + 0 ones = 500 + 70 + 0.
Teach this relationship, check actual opportunity and receive own words before staff models. Later requires a real teaching interval, not a day label.
D-first-Q4
Is the supplied helper claim supported? Explain the actual value of the relevant places or groups.
Criterion
Rejects the actual helper claim and recovers 507 from all stated groups; the numeral/model place values, including the zero, support the explanation.
After-own staff possibility
4 hundreds+10 tens+7 ones =400+100+7=507, not 417.
Teach this relationship, check actual opportunity and receive own words before staff models. Later requires a real teaching interval, not a day label.
Answers/criteria/fullNEXT/adult models remain staff-only. Complete source facts/labels and supplied helper claim are neutral input, not prefilled child responses.
