A test mark tells you where you stood on one morning. Your journal shows what changed across a semester, and you are the only person who can build it.
What it is for
This course asks you to design investigations and then to defend the numbers they produce. Most of the interesting work happens before you touch any equipment — choosing what to measure, deciding what to hold constant, committing to a prediction — and most of the rest happens in the twenty minutes afterwards, when you are deciding what your figures are allowed to mean.
None of that survives in a data table. It survives here or nowhere.
What goes in
| Goes in | Does not go in |
|---|---|
| Predictions, written before you measured, with a reason | Marks and grades |
| The raw readings, with their units | Only the final calculated answer |
| Which instrument gave each reading, and how finely it reads | Copies of the concept pages |
| Reasoning you later found out was wrong | A summary of what we covered |
| A number that surprised you, and what you did next | Everything you handed in |
| Questions you still cannot answer | Anything you wrote to impress me |
The left column is what a reader learns something from. The right column already exists somewhere else.
Raw readings, not just answers
This is the entry habit that separates a useful journal from a decorative one, and it takes ten extra seconds.
Write down the numbers the instruments actually gave you, before any arithmetic. If your entry says only ” mol”, and you later discover you used the wrong molar mass, the entry is dead — there is nothing left to recompute from. If it says “2.46 g on the four-figure balance in the fume hood; molar mass taken as 58.44 g/mol”, you can fix the error in one line, three weeks later, and the record is still honest about what you did at the time.
The same applies to a value you looked up. Write down where you got it and under what conditions it applies, the way Reading a Data Table describes. A number with no provenance cannot be checked, which means it cannot be defended.
The habit that makes it work
Write the entry the day of the work. The details you will want at the end of the course — what you tried first, which reading you doubted at the time, the moment your group changed the plan — are gone within a week and no amount of effort in the final month brings them back. Ten minutes on the day beats an hour in the last week of the semester.
Rhythm
- After every investigation, one entry.
- After every discussion, two or three sentences on what moved.
- Once mid-semester, a Showing Growth comparison.
- At the end, Final Reflection.
Predictions get written down before the measurement
Not after. A prediction you record afterwards is not a prediction, and your memory of what you “basically expected” is generous to you in a way you will not notice.
Grade 11 adds one requirement to that. Where you can, make the prediction a number with a direction: not “some product will be lost”, but “we will recover less than the calculated mass, because some precipitate will stay on the filter paper”. A prediction shaped like that can be checked against your own data, and being wrong about it teaches you something specific.
Next: Your First Entry. Then read What a Strong Entry Looks Like before you write your second.