Adding 2-Digit Numbers with Regrouping
Students add two 2-digit numbers that require renaming (regrouping) ones into tens, using concrete materials, pictorial representations, and the column algorithm.
Key Questions
- Why do we need to regroup when the ones digits add up to 10 or more?
- How does the column method help us organise addition with regrouping?
- How can we use estimation to check whether our answer is reasonable?
MOE Syllabus Outcomes
About This Topic
Precision throwing and catching are fundamental manipulative skills that form the basis for many team sports. At the Primary 2 level, the Singapore MOE curriculum focuses on the underhand toss and the development of 'soft hands' for catching. Students learn to track a moving object with their eyes and position their bodies effectively to receive it. This stage is less about power and more about accuracy and the 'give' in the hands during a catch.
These skills are essential for developing hand-eye coordination and confidence in physical play. By practicing with various objects like beanbags, foam balls, and tennis balls, students learn how different weights and sizes affect their technique. This topic is most effective when taught through station rotations and peer coaching, allowing for high repetition and immediate feedback.
Active Learning Ideas
Station Rotations: Target Practice
Set up stations with different targets: hoops on the floor, buckets on benches, and wall markings. Students use underhand tosses to hit targets from varying distances, recording their successful hits.
Peer Teaching: The Catching Coach
In pairs, one student tosses a beanbag while the other catches. The tosser acts as a 'coach', checking if the catcher's eyes are on the ball and if they are 'pulling' the ball into their body to soften the impact.
Simulation Game: The Fire Brigade
Students form a line and pass a ball (the 'water bucket') down the line using underhand tosses and catches. They must work together to move the 'water' quickly without dropping it.
Watch Out for These Misconceptions
Common MisconceptionStudents often try to catch with just their fingers or 'clap' their hands onto the ball.
What to Teach Instead
Teach the 'basket' or 'cup' hand position. Explain that hands should 'give' or move toward the body as the ball arrives. Using a 'think-pair-share' to compare 'hard hands' versus 'soft hands' helps them feel the difference.
Common MisconceptionChildren think they should look at their hands when catching.
What to Teach Instead
Emphasize 'eyes on the prize', tracking the ball from the moment it leaves the thrower's hand until it is safely in theirs. Use bright-colored balls to make tracking easier during initial practice.
Suggested Methodologies
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Frequently Asked Questions
What is the best equipment for P2 throwing and catching?
How do I teach the underhand toss 'follow through'?
How can active learning help students understand throwing and catching?
What should I do if a student is afraid of the ball?
Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
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