Land On It
This time you get the answer and you build the question. Pick anywhere on the line to start. The walk from there to the target is your expression — and there are endlessly many, so find three.
No score is kept. No points, no streak, no ranking — the only number anyone writes down is the one your teacher writes down, standing next to you.
Drag the marker, tap the line, or use the arrow keys to choose where you start.
- 1Draw three walks that land on −3. At least one from each side.−10−50510Write each one:
- 2Draw three walks that land on 6. At least one from each side.−10−50510Write each one:
- 3Draw three walks that land on 0. At least one from each side.−10−50510Write each one:
There is no right answer here. It only tells your teacher where to start next time.
Look at what you wrote.
Every one of these is a different expression. Every one of them is true. That is not a trick — a number has endlessly many names, and you just wrote nine of them.
For the teacher — this device only
This one is not x of ten. There are no items to be right about, so the row counts what the student produced: how many expressions they built, and how many targets they reached from both sides. Approaching from both sides is the understanding — a student who only ever starts to the left has found three walks but one idea. Nothing is sent anywhere; copy the row yourself or print this page.
- Date
- —
- Skill
- Build equivalent integer expressions on a number line
- Measure
- Count — what was produced
- Expressions built
- 0 built
- From both sides
- 0 of 3 targets
- Hints used
- 0
- Confidence
- —
The third target in every set is zero, on purpose: the ways to land on zero are the zero pairs, met as something the student found rather than something they were told. Set 2 and Set 3 are the same three moves with different targets, so the same student can work this three weeks running.