From Python to Algorithms, AI, and Projects: How Should Students Plan Their Learning Path?
A four-stage learning path that builds Python foundations, algorithmic thinking, responsible AI use, and meaningful projects.
AI Literacy Articles
Python Learning Notes
Why Does Greedy Sorting Always Work? The Exchange Argument with Time on Task
Use CCC 2013 Time on Task to understand shortest-first greedy selection and prove it with an exchange argument.
CP Weekly Challenge
CCC 2016 J5/S2 Tandem Bicycle Solution: Sort First, Then Pairing Has Only One Answer
Sort both teams, pair in the same order for the minimum or opposite order for the maximum, and prove why with an exchange argument.
CP Weekly Challenge
CCC 2023 S2 Symmetric Mountains Solution: Center Expansion for Minimum Asymmetry at Every Length
Fix each odd or even center, expand outward, and find the minimum asymmetry for every crop length in O(N²).
AI Literacy Articles
Recent AI Updates: What Actually Matters for Your Child’s Learning
Look past weekly AI headlines and focus on three durable changes: learning contexts, school rules, and the skills students need.
AI Literacy Articles
How Should AI Support Student Learning? Helping Without Replacing
A practical framework for using AI to prompt thinking, practice, explanation, and verification without replacing the student’s work.
Python Learning Notes
How Do You Build and Traverse a 2D List?
Learn how to build, index, read, and traverse Python 2D lists while avoiding shared-row aliasing mistakes.
CP Weekly Challenge
CCC 2022 J4/S2 Group Work Solution: Count Violated Constraints in One Pass with a Dictionary
Map each name to its group with a dictionary, then count every violated constraint in two linear passes, with Python and C++ solutions.
Python DSA Notes, Python Learning Notes
What Is a Dry Run? Trace Your Code Before Running It
Trace code with small inputs and variable tables to catch boundary, initialization, and update-order mistakes.
CP Weekly Challenge
USACO 2018 December Bronze Mixing Milk Solution: Simulating 100 Pours
Learn the USACO 2018 December Bronze Mixing Milk solution with direct simulation, cyclic updates, invariants, and tested Python and C++ code.