Inventions for education

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Across
  1. 2. the softwares that you can download to your device
  2. 5. right or appropriate for a particular purpose
  3. 6. a small and portable computer that can work with a battery
Down
  1. 1. worth a lot of money
  2. 3. that can help you to do or achieve what you want
  3. 4. a mobile phone