Percentages | Assessment Review
Students review how percentages are used in coding contexts such as scoring systems, discounts, data displays, and conditional logic. The lesson focuses on applying percentage calculations accurately and interpreting results in code-related scenarios.
| Term | Definition |
|---|---|
| percentage | A number out of 100 used to compare parts of a whole. |
| percent change | The amount something increases or decreases as a percentage of the original value. |
| reverse percentage | Finding the original value after a percentage has been applied. |
| algorithm | A step-by-step set of instructions used to solve a problem. |
| variable | A named value in a program that can change. |
Display 3 short percentage questions linked to coding contexts, such as score increases and discount calculations. Ask students to solve independently.
Work silently, show calculations, and identify any formulas used.
Review key percentage formulas and model one example of converting a word problem into pseudocode or step-by-step logic.
Annotate notes and ask clarifying questions.
Work through two challenging examples with the class: one percentage increase and one reverse percentage problem. Emphasize structure, accuracy, and checking answers.
Solve alongside the teacher, then explain each step to a partner.
Circulate, prompt struggling students, and push advanced students to justify their reasoning or write pseudocode for one answer.
Complete a set of mixed review problems, including at least one coding-context question.
Display answers or solution steps. Ask students to compare work, correct errors, and note one common mistake.
Swap work, mark corrections, and identify where they lost accuracy.
Recap the three most important percentage skills from the lesson and ask students to write one error they will avoid on future problems. End with a quick verbal check: 'When do we use reverse percentage?'
Complete a mixed review sheet with 6 percentage problems, including 2 coding-context questions and 1 reverse percentage problem. Show all working.