Mathematics, grade 2, mapped

65 claims across 5 strands · 86 of 100 skills in grades 1-2 appear here

Pick a skill to light what it rests on.

Algebraic reasoning

  1. 2.7.B rests on 1.5.C stepping by a hundred works the way stepping by ten does once the columns are visible
  2. 1.5.F rests on 1.5.E an unknown is findable once the equal sign means both sides come to the same value
  3. 2.7.C rests on 1.5.F an unknown anywhere in the sentence is the grade 1 equation work inside a story
  4. 2.7.C rests on 1.5.D an unknown inside a story needs the story written as an equation
  5. 1.5.B leans on 1.5.A counting in twos and fives is its own sequence, and reciting every number in between makes it feel familiar
  6. 2.7.A leans on 1.5.B pairing a pile off answers even or odd on its own, and counting the pairs in twos speeds it up
  7. 2.7.B rests on 2.2.A from another strand naming the value of a digit is place value itself, and a hundred more is a change in one column
  8. 1.2.D rests on 1.5.A from another strand naming a number greater than 87 is reciting forward from it and stopping wherever you like
  9. 2.4.B leans on 1.5.G from another strand rearranging addends to make the arithmetic easier is the properties work from the year before
  10. 1.5.D rests on 1.3.B from another strand the number sentence for a story comes after the story is solvable with objects
  11. 1.4.C rests on 1.5.B from another strand counting a row of nickels is skip counting with coins in place of objects
  12. 2.6.A leans on 1.5.B from another strand counting in fives is one way to total equal sets, and laying the sets out is another

Data analysis

  1. 1.8.B rests on 1.8.A drawing a graph comes after the data is sorted into categories
  2. 1.8.C leans on 1.8.B having drawn the bars is a fast way to learn what a reader is meant to take off them
  3. 2.10.A leans on 1.8.B drawing a bar is one good way to see what its length stands for, and being told is another
  4. 2.10.B rests on 1.8.B four categories with intervals is the picture-graph work with more in it
  5. 2.10.C rests on 2.10.A reading a value off a chart needs the bar length or picture count to mean something
  6. 2.10.D rests on 2.10.C a conclusion comes after the plain questions are answerable
  7. 2.10.D rests on 1.8.C making a prediction extends the conclusion-drawing the year before asks for
  8. 2.10.C rests on 1.3.F from another strand writing a question about a graph is the compose-a-situation work with the numbers read off

Geometry and measurement

  1. 1.6.H rests on 1.6.G telling a real half from a near one comes after cutting fair shares by hand
  2. 2.8.A rests on 1.6.C building a shape to a specification takes being able to make the shapes at all
  3. 2.8.B rests on 1.6.E sorting solids works on solids the year before has already named
  4. 1.6.B rests on 1.6.A telling which attributes define a shape comes out of having sorted by attribute
  5. 1.6.D leans on 1.6.B the formal names sit better once attributes are sorted, though children name shapes long earlier
  6. 2.8.C rests on 1.6.D sorting by side count works on shapes that already have names and attributes
  7. 2.8.D rests on 1.6.F composing to a given property is the joining work that made target shapes
  8. 2.8.E leans on 2.8.D cutting a rectangle into triangles and building one out of triangles are the same seam seen twice
  9. 1.7.C rests on 1.7.B comparing two unit sizes works on a length that is already a count of same-size units
  10. 1.7.D rests on 1.7.B a length said as a number and a unit takes the unit as the thing being counted
  11. 2.9.A leans on 1.7.A a ruler laid along a table is where the idea of a fixed unit tends to turn up early
  12. 2.9.B rests on 1.7.C the inverse relationship is what the two-unit comparison shows, stated as a rule
  13. 2.9.D rests on 2.9.A reading a ruler works on a standard unit that is already familiar
  14. 2.9.D rests on 1.7.D reading to the nearest mark is whole-unit reporting with a scale printed on it
  15. 2.9.E rests on 2.9.D estimating comes after enough lengths are measured to have a sense of the size
  16. 2.9.G rests on 1.7.E minutes come after the hour and the half hour are readable on a face
  17. 2.9.A rests on 1.7.B an inch is still a unit laid end to end with no gaps, and a standard one
  18. 2.9.F rests on 1.7.B covering a rectangle with no gaps or overlaps is the end-to-end unit iteration turned sideways
  19. 2.6.B leans on 1.6.G from another strand sharing a set out evenly is the fair-shares idea applied to a count rather than a shape
  20. 2.3.A rests on 1.6.G from another strand eighths are the fair-shares work from the year before, cut once more
  21. 2.3.D rests on 1.6.H from another strand sorting examples from non-examples is the halves-and-fourths judgement with eighths added
  22. 2.9.C leans on 2.2.E from another strand reading a distance on a line leans on the number already having a place on it

Number and operations

  1. 1.2.C rests on 1.2.B expanded form writes down the hundreds, tens and ones the number was built out of
  2. 1.2.E rests on 1.2.B comparing by place value works on a number that already comes apart into tens and ones
  3. 1.2.F rests on 1.2.E putting a set in order is comparing two of them, over and over
  4. 1.2.G rests on 1.2.E the symbol is shorthand for a comparison already made in words
  5. 2.2.A rests on 1.2.B composing to 1,200 is the same hundreds-tens-ones move the 120 work sets up
  6. 2.2.B rests on 1.2.C expanded form to 1,200 reads the way it does to 120, with one more column in it
  7. 2.2.D rests on 1.2.G comparing to 1,200 with symbols is the to-100 symbol work over a wider range
  8. 2.2.E rests on 1.2.F placing a number on an open line is the ordering the 120 number lines already ask for
  9. 2.2.F leans on 2.2.E naming the number at a marked point and placing one on a blank line are the same correspondence either way
  10. 2.2.C rests on 1.2.D generating a greater or lesser number anywhere up to 1,200 is the move the 120 range asks for
  11. 2.2.D rests on 1.2.F ordering to 1,200 is the 120 ordering with another column to sort on
  12. 1.3.D rests on 1.3.C making ten as a strategy takes a ten built out of parts as given
  13. 2.4.A rests on 1.3.D automatic recall comes after the strategies that make the answer findable
  14. 2.4.B leans on 2.4.A a column of two-digit numbers comes apart into single-digit sums a child already knows
  15. 2.4.B rests on 2.2.A an algorithm based on place value works on a number seen as hundreds, tens and ones
  16. 2.4.C rests on 2.4.B solving within 1,000 runs on two-digit strategies that are already reliable
  17. 2.4.C rests on 1.3.B a multi-step word problem is the joining and separating work with bigger numbers in it
  18. 2.4.D leans on 2.4.C posing a situation and solving one feed each other, and inventing is often the way into solving
  19. 2.4.D rests on 1.3.F writing a story for a number sentence is the within-20 version over a wider range
  20. 1.3.A leans on 1.2.B forty and seven making forty-seven leans on tens and ones, and just as often is how tens and ones get built
  21. 1.3.C leans on 1.2.A composing ten leans on seeing a small arrangement without counting it one at a time
  22. 1.3.E leans on 1.3.D explaining why you took two off the eight leans on having chosen the move rather than been handed it
  23. 1.3.F rests on 1.3.B writing a situation for a number sentence is the word-problem work run the other way
  24. 1.4.C rests on 1.4.A counting a handful takes each coin already having a known value
  25. 2.5.A rests on 1.4.C a collection up to one dollar adds the quarter to the pennies, nickels and dimes already counted
  26. 2.5.B rests on 2.5.A writing an amount in dollars and cents comes after the total is worked out
  27. 2.5.B rests on 1.4.B the dollar sign and the decimal point extend the cent symbol the year before introduces
  28. 2.6.B leans on 2.6.A joining equal sets and sharing a set out are the same picture read from either end
  29. 2.3.B rests on 2.3.A noticing that more parts makes each part smaller comes after the parts are made
  30. 2.3.C rests on 2.3.A counting past one whole needs the parts to have names already
  31. 2.3.D leans on 2.3.A spotting a false eighth and cutting a true one grow together, and judging often comes sooner
  32. 2.7.B rests on 2.2.A from another strand naming the value of a digit is place value itself, and a hundred more is a change in one column
  33. 1.2.D rests on 1.5.A from another strand naming a number greater than 87 is reciting forward from it and stopping wherever you like
  34. 2.4.B leans on 1.5.G from another strand rearranging addends to make the arithmetic easier is the properties work from the year before
  35. 1.5.D rests on 1.3.B from another strand the number sentence for a story comes after the story is solvable with objects
  36. 1.4.C rests on 1.5.B from another strand counting a row of nickels is skip counting with coins in place of objects
  37. 2.6.A leans on 1.5.B from another strand counting in fives is one way to total equal sets, and laying the sets out is another
  38. 2.6.B leans on 1.6.G from another strand sharing a set out evenly is the fair-shares idea applied to a count rather than a shape
  39. 2.3.A rests on 1.6.G from another strand eighths are the fair-shares work from the year before, cut once more
  40. 2.3.D rests on 1.6.H from another strand sorting examples from non-examples is the halves-and-fourths judgement with eighths added
  41. 2.9.C leans on 2.2.E from another strand reading a distance on a line leans on the number already having a place on it
  42. 2.10.C rests on 1.3.F from another strand writing a question about a graph is the compose-a-situation work with the numbers read off

Personal financial literacy

  1. 1.9.B leans on 1.9.A spending income leans on income having a name
  2. 2.11.A leans on 1.9.C watching savings add up leans on saving being a separate idea from spending
  3. 2.11.E leans on 2.11.D lending is the borrowing situation seen from the other side of the table

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