Explore the World of Mathematics
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Latest Articles
Decimal Place Value with Base-Ten Blocks and Number Lines: Build a Decimal
Build a Decimal is a no-prep digital tool for decimal place value: students build tenths, hundredths and thousandths with base-ten blocks, with wholes and parts kept apart, and see each number in words, as a fraction, in expanded form and on a number line.
Math Talks for Grades 3-5: Why Open-Ended Questions Matter, and 150 That Check Themselves
Why math talks build reasoning and number sense, why open-ended questions with more than one right answer matter most, and a self-checking set of 150 math talk cards in 15 styles for grades 3 to 5.
Mental Math Strategies for Multiplication: 107 Self-Checking Problems, Instant feedback
Multiplying by 9, 11 and 5, doubling, factors of 100 and 1000, rounding, and halving and doubling explained with base-ten blocks, a free number talk for grades 3 to 5, and a self-checking digital version of the slide deck.
Mental Math Strategies for Addition and Subtraction: 117 Self-Checking Problems
Compensating, decomposing, balancing and clustering explained with base-ten blocks, a free number talk for grades 2 to 5, and a self-checking digital version of the slide deck.
Problem Solving Strategies: 112 Self-Checking Word Problems
The six problem solving strategies explained, with free word problems for grades 4 to 6, and a self-checking digital game where every solution shows the strategy.
Addition with Regrouping Game: Addition Build
Addition Build is a no-prep digital game for grades 1 to 3: students loop 10 ones and SNAP them into a ten, or 10 tens into a hundred, so regrouping in addition makes sense.
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