2nd Grade Math Games | Second Grade Math Concepts | ST Math

Place Value Petals

Model 3-digit numbers using visual place value representations.

Use a visual base ten model to represent 3-digit numbers with hundreds (bouquets), tens (flowers), and ones (petals).
Apply the idea that a set of 10-ones or tens makes 1 set of the next higher unit.
Levels begin by matching the visual model to base-10 numbers (1, 10, 100), then progress to modeling 3-digit numbers with visuals.

Number Line to 100

Estimate points on number lines up to 100 using benchmarks.

Develop estimation strategies for finding numbers to 100 using benchmarks.
Levels begin with number lines to 20, then progress to number lines to 100 with 0, 50, and 100 as benchmarks.
Feedback allows students to revise their estimates based on initial responses.

Two-Step Problem Solving

Use addition and subtraction strategies to solve 2-step problems.

Develop strategies for solving multi-step problems using addition and subtraction.
Find the exact number of pies that the ‘Pie Monsters’ need by adding or subtracting from the given pies on the table.
Levels begin by feeding 1 monster visual pies, then move to feeding 2 monsters with numbers representing pies.

Measuring Length

Develop concepts of measuring length in non-standard and standard units.

Understand length as distance measured by iterating units without gaps or overlaps.
Levels begin with non-standard, visual objects placed side-by-side, then progress to using rulers to measure distance.
Feedback allows students to revise their estimates based on initial responses.

Unknowns in Addition and Subtraction Situations

Find unknown numbers for addition or subtraction equations using visual models.

Fill in the missing number to make an equation true using a visual model for adding or subtracting one- and two-digit numbers.
Levels begin with finding sums or differences, then move to finding missing addends or subtrahends.
Equations are posed with operation on either side of the equal sign: 24-3= 21 and 21=24-3.

More Than, Less Than Comparing

Compare two whole numbers and find the difference.

Develop the concept and language for comparing two whole numbers by finding the difference as ’more than’ or ‘less than’.
Levels begin with visual models with differences of 2 to 4 blocks, then advance to comparing whole numbers: e.g, ‘3 is 2 less than 5’.
Feedback allows students to understand the language and concept of comparing as addition or subtraction.