Youngsters have problems in understanding which Excel formula they should use. Youngsters do not comprehend the Excel formulas.

### Summary

## Student Problem (1) | ## Teaching Activity (0) |

Youngsters have problems in understanding which Excel formula they should use. Youngsters do not comprehend the Excel formulas.

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## Student Problem (1) | ## Teaching Activity (0) |

Youngsters have problems identifying the rule they should apply. Youngsters do not know the signification of the Excel function "IF".

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## Student Problem (1)- School 16-18
| ## Teaching Activity (0) |

Youngsters have problems understanding the practical application.

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## Student Problem (1)- School 11-15
| ## Teaching Activity (0) |

Use and practical application of conditions in loops (several times) versus if structures (once). But it's not just conditions that students stumble over; it's understanding the problem in the first place. Then, within a loop they might have:

- a complicated condition, e.g. using %2==0 as a test for even numbers when they need only increment in twos.
- output from within the loop rather than once after the loop
- use a dialog when the instructions are to use print out
- use non-self-descriptive identifiers e.g. 'sum' when they're asked to total something and thus might better call it 'total'
- get the wrong start and stop values, e.g. 0 to start a loop to 100, but stop at 100 instead of <100, or loop 50 times instead of 100 times

So a quiz might be:

- What's being calculated?
- Calculate it manually for a smaller number range, e.g. 1 to 10 instead of 1 to 100
- How many numbers meet the criteria?
- How much should you increment on each loop? by 1, 2 minus 1? minus 2? Why?
- if you add all even numbers between 1 and 10 what do you get?
- How many even numbers are there between 1 and 10?
- How many odd numbers are there between 1 and 10?
- What might you start from: 1? 2?
- How often should you print.?
- Write a loop to print the two times table from 1 to 12.

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## Student Problem (0) | ## Teaching Activity (0) |

Java Collections require use of objects, themselves a tricky topic. The Collections objects are implemented using Interfaces and there is a mapping between the Interfaces and the Collections, e.g. HashMap and Map.

Then there is the need to iterate over Collections, which might be tricky for some students.

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## Student Problem (0) | ## Teaching Activity (0) |

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## Student Problem (9) | ## Teaching Activity (0) |