Kindergarten Spring Math — Compose/Decompose to 10, Addition & Subtraction within 10, Teen Numbers as Ten-and-Ones, Measurement, and Classification
Math · GM
K
math.gK.s.gm.compare_weight_capacity
Directly compare two objects by weight and capacity (K.MD.A.1, K.MD.A.2)
Directly compare two objects by weight (heavier/lighter/same weight) using a balance pan, and by capacity (holds more/holds less/holds the same) using identical clear cups with pour-from-one-to-the-other. Vocabulary: heavier than, lighter than, same weight, holds more than, holds less than, holds the same. The capacity work uses identical containers; the same-shape-cup constraint is named explicitly.
Mastery threshold
90%
Min instances
10
Typical minutes
25
Spaced intervals (days)
1, 3, 7, 14, 30, 60
Successors
-
math.g1.s.gm.weight_with_standard_units
(not yet loaded)
-
math.g2.s.gm.capacity_with_standard_units
(not yet loaded)
Common misconceptions
- Thinks bigger object always weighs more (a feather pillow vs. a small rock — child predicts pillow heavier).
- Thinks taller cup always holds more even when cups have different widths (a tall narrow tube vs. a short wide bowl).
- Predicts capacity by number of items inside (a cup with 10 small marbles vs. a cup with 3 large balls — says the marble cup holds more 'things' so holds more).
- Confuses heavier with bigger and lighter with smaller (size-mass confusion, classic Piagetian).
- Reads the balance pan after only briefly placing objects (motion not settled — both pans still moving).