OTWONO LABS
Knowledge Library
Original starting notes about source literacy, experiments and learning records. Browse the list or bring relevant entries to the top with search and subject ordering.
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28 published lessons and knowledge notes.
Algebra
Equations: find a missing number without breaking the balance
Solve a simple addition equation and verify the answer by putting it back into the original statement.
Arithmetic
Fractions from the beginning: different names for the same amount
Explain what a fraction means and show why two different fractions can describe the same amount.
Computational thinking
Procedures: write instructions that handle ordinary and awkward cases
Turn a sorting rule into a sequence someone else can follow and test its boundary cases.
Data literacy
Reading charts: understand the values behind the picture
Read a bar chart’s labels and scale, then distinguish a total count from a completion percentage.
Information organization
Organizing information: make the right item easy to retrieve
Choose simple labels and filters that answer a real retrieval question without creating conflicting copies.
Learning practice
Design a useful practice task
Match an exercise to the skill you actually want to develop.
Keep a useful learning record
Record the work that supports understanding, not just the pages you opened.
Logic
If then reasoning: what a rule actually lets you conclude
Apply a rule in its stated direction and test an invalid reversal using a counterexample.
Measurement
Measurements: describe the same length in different units
Convert meters to centimeters and back while checking that the physical length stays the same.
Probability
Probability: count the possible outcomes before guessing
Calculate a simple chance by counting equally likely outcomes and update the count when the situation changes.
Problem solving
Troubleshooting: narrow a problem before choosing a solution
Separate what you observed from what you inferred and choose a check that distinguishes possible explanations.
Programming
Programming variables: follow one value through a program
Trace a stored number through a short sequence of updates.
Project planning
Project planning: understand what can happen together
Build a simple schedule from prerequisites and explain why working hours can differ from elapsed hours.
Quantitative reasoning
Compare numbers with context
Check units, denominators and starting values before comparing figures.
Estimation: work out what an answer could reasonably be
Distinguish an estimate from a lower or upper bound and use a bound to test a guarantee.
Ratios: keep a mixture the same while changing its size
Build a larger mixture by repeating a complete group, then explain the difference between a ratio and a fraction of the whole.
Read a chart carefully
Inspect axes, scales and missing context before interpreting a chart.
Understand a percentage
Use a visual grid to connect a part, a whole and a percentage.
Research methods
Ask a useful question
Turn a broad interest into a question you can investigate.
Comparisons: measure a difference without inventing its cause
Calculate a simple group average and explain what additional information is needed for a fair comparison.
Design a small experiment
Turn a question into a bounded test with a useful record of what happened.
Map a simple system
Use inputs, a process, outputs and feedback to understand an everyday task.
Write a method someone can repeat
Make your process clear enough for another person to follow.
Source literacy
Read a claim carefully
Separate what is observed, what is inferred and what remains uncertain.
Separate observation and explanation
Use a simple example to distinguish what you see from what you infer.
Trace a source to its origin
Follow an assertion back to the document or observation that supports it.
Visual design
Visual design: help a reader know where to look and what to do
Arrange a small information card so its subject, useful details and next action are easy to identify.
Writing and communication
Clear writing: give a reader what they need to act
Replace a vague message with a specific instruction while preserving what is known and unknown.
Our editorial standard
A note should state its scope, distinguish observation from inference and provide a correction route. These introductory notes are practical frameworks, not research findings. As the library grows, source records and review history will become more detailed.