The Common App activities section gives you 150 characters per activity description. That's roughly one sentence. Most students waste these characters on generic descriptions ('Led meetings, organized events, managed team'). Strong descriptions use every character to show impact.
The formula
Strong 150-character descriptions follow this pattern: [Action verb] + [specific what] + [quantifiable result or scope].
Weak examples
- 'Led meetings and organized events for club members.' (49 chars — wasted space, no specifics)
- 'Helped with research in professor's lab.' (41 chars — vague)
- 'Participated in competitions and practiced regularly.' (54 chars — no outcomes)
- 'Tutored students in math and science subjects.' (47 chars — generic)
Strong examples
- 'Designed tutoring program serving 45 students weekly; avg math scores rose 18%. Trained 8 peer tutors.' (103 chars)
- 'Co-authored paper on protein folding published in J. Computational Biology; presented at ACS conference.' (106 chars)
- 'Built open-source app (2.3K GitHub stars) automating school scheduling; adopted by 3 districts.' (97 chars)
- 'Organized 12 community cleanups (200+ volunteers); removed 4 tons of debris from local waterways.' (100 chars)
What to include
- Specific numbers (members, hours, dollars, percentages, participants).
- Specific outcomes (what changed because of your work).
- Specific scope (how many people affected, how widely adopted).
- Action verbs (designed, built, organized, led, created, published, presented).
What to cut
- 'Helped with' — replace with specific action.
- 'Participated in' — replace with what you actually did.
- 'Managed' without specifics — add what you managed and the result.
- 'Various' or 'multiple' — be specific about what and how many.
- Filler words ('also,' 'additionally,' 'furthermore').
- The activity name (it's already in the title field).
How to order activities
- Most impactful first. Reader attention diminishes from #1 to #10.
- Your spike should be positions #1-2.
- Don't order chronologically or alphabetically.
- Order by what reveals the most about you.
- If an activity had increasing responsibility, use the most recent/impactful version.
Using the additional details field
Common App also has a field for additional details (optional). Use it for:
- Context that doesn't fit in 150 characters.
- Links to portfolios, publications, or projects.
- Brief explanation of the activity's significance.
- Awards or recognition received through the activity.
Activity categories on Common App
Choose the most accurate category. Don't game categories. Common categories: Academic, Art, Athletics, Career-Oriented, Community Service, Computer/Technology, Cultural, Dance, Debate/Speech, Environmental, Family Responsibilities, Foreign Exchange, Journalism/Publication, Junior ROTC, LGBT, Music, Religious, Research, Robotics, School Spirit, Science/Math, Student Govt, Theater/Drama, Volunteer, Work (Paid), Other.
Special situations
Work experience
Paid work is a legitimate and valued activity. Describe specific contributions, not just job title. 'Managed inventory system for 500+ SKUs; reduced stockouts 35%' beats 'Worked as cashier at grocery store.'
Family responsibilities
Caring for siblings, translating for parents, contributing to family income. These are valued and should be listed. 'Primary caregiver for 2 younger siblings (15 hrs/wk) while parents worked evening shifts' is specific and legitimate.
Self-directed projects
Apps built, businesses started, research conducted independently, content created. Describe the project's scope and impact. 'Built and launched personal finance app; 1,200 monthly active users; featured in local press.'
Activities you had to stop
If you stopped an activity due to circumstances (COVID, family situation, injury), you can still list it with the grades you participated. The dates field shows when you were involved.
Common mistakes
- Using full sentences when fragments work better in 150 characters.
- Listing duties rather than achievements.
- Not using numbers when they're available.
- Repeating the activity title in the description.
- Ordering randomly rather than by impact.
- Leaving the additional details field empty when context would help.
- Not including legitimate activities (work, family responsibilities).
- Inflating achievements. Admissions can verify; dishonesty undermines credibility.
The bottom line
150 characters per activity. Make every one count. Action verb + specific what + quantifiable result. Order by impact, spike first. Include work and family responsibilities. Don't waste characters on generic language.