Study a clear reference
Know the three concepts your explanation needs to convey. Each lesson links to primary teaching material.
ExplainSchool · Computer science foundations
Understand it well enough
to explain it.
Practice the ideas behind your first computer science course. Explain from memory, inspect the feedback, refine your answer and return when it is time to remember.
Six focused lessons · Personal practice stays private · Pilot release
A complete practice cycle
A better answer is only the beginning.
Explain without notes
Retrieve the idea yourself. Feedback connects your exact words to the source passage and rubric.
Revise, then return
Use a hint before a model answer. Compare retries with the same rubric and revisit the idea later.
Get a tutor's judgement
Submit selected work to a class assignment. Your tutor can inspect the evidence and leave a separate review.
The first course
Explain computer science.
Build a foundation for discussions, interviews and oral exams.
01
Bits, bytes and binary
Connect binary place values to familiar numbers.
8 min
02Algorithms and precise instructions
Turn a goal into steps another person can follow.
8 min
03Linear and binary search
Explain why halving a sorted search space saves work.
10 min
04Reasoning about growth
Separate growth rates from stopwatch timings.
10 min
05Recursion and stopping
Explain a smaller subproblem and the condition that ends it.
10 min
06Choosing a data structure
Explain a practical tradeoff between arrays and linked lists.
10 min
Independent tutor review is pending. Automated feedback is a practice aid; learning outcomes have not yet been validated in a student pilot.