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Disha Edge

The school app lab: Developer

A school library is testing a borrowing app with invented records. You play the developer and work through 9 short levels, about 14 minutes in all. Where you start: A program follows the condition you write. A tiny boundary mistake can change who gets access. The work connects to careers such as data analyst and software engineer. It is free, and your reflection stays private.

Your path

A library rule, a missed case and a careful release.

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Private stars

A star marks a step you completed. Your answers and speed do not change it.

The school app lab

  1. Easy startTry the edges of a ruleStart this level
  2. Guided exampleWatch the approach
  3. Try a taskThe exact boundary
  4. Try a taskMissing title
  5. Try a taskInvestigate a bug
  6. Try a taskWrite a useful bug note
  7. Bring it togetherOne fix, several checks
  8. Your reflectionPause and notice
  9. Look backWhat the work involved

This is an original Disha learning activity. Career rules need a separate official check.

The full guide on one page

The main facts from the tool above, written out so you can read them in one go.

What does a developer do in this activity?

A school library is testing a borrowing app with invented records.

A library rule, a missed case and a careful release.

Where you start: A program follows the condition you write. A tiny boundary mistake can change who gets access.

A worked situation: A reading room allows entry at age 14 or above. The draft rule says age > 14.

  1. Try age 13: the rule blocks it.
  2. Try age 14: the rule also blocks it, though entry should be allowed.
  3. Change the comparison to include the boundary and test again.

What are the levels?

  1. Try the edges of a rule, easy start, under a minute
  2. Watch the approach, guided example, 1 minute
  3. The exact boundary, try a task, 2 minutes
  4. Missing title, try a task, 2 minutes
  5. Investigate a bug, try a task, 2 minutes
  6. Write a useful bug note, try a task, 2 minutes
  7. One fix, several checks, bring it together, 3 minutes
  8. Pause and notice, your reflection, 1 minute
  9. What the work involved, look back, under a minute

Which careers is this work part of?

  • Data Analyst

    Turn recorded data into a checked explanation for a decision.

  • Software Engineer

    Turn a user’s need into reliable software, then test and maintain it.

The other role in this workplace: Team lead

About this activity

Last checked .