| Dimension | What matters |
|---|---|
| Granularity | One teachable unit at a time |
| Instruction quality | Clear explanations, worked examples, minimal noise |
| Mastery truthfulness | ”Completed” means mastered |
| Coverage and rigor | Aligned to real external tests |
| Efficiency | Fewer hours to reach the same verified outcome |
| Hole-filling compatibility | Targeted remediation is possible when gaps show up |
Concepts
Evaluating apps
How Timeback measures app quality
Timeback operates on a simple principle: if students are not learning, it is the system’s fault. Apps are evaluated the same way.
If an app performs well on engagement but poorly on externally validated outcomes, the closed loop forces the conversation back to instruction, mastery, and signal integrity.
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