SlideShare a Scribd company logo
Crowdsourcing
Data for Good
Data for Good Meetup
Domino Data Labs – 30 August 2017
About me
Philosopher
then
Software Engineer
then
Data Scientist
Co-founder of DrivenData
@pjbull | @drivendataorg
Agenda
Data and the social sector
The crowdsourcing approach
Case studies
How to get involved
What is data for good?
Hackers (1995) 6.2/10 stars on IMDB
That’s a beautiful vision, but
more often it feels like…
Transformers: Age of Extinction (2014) 5.8/10 stars on IMDB
Simple coding…ALGORITHMS!MATH!Why can’t we make what we want to make the way we want to make it?
But, for social sector organizations,
the reality is…
Why?
THE DATA CAPACITY GAP
$135,000
average salary
executive director
US nonprofit
140k – 180k
shortage of data
scientists
$118,700
average salary of
data scientist
“Finding ways to make big data
useful to humanitarian decision
makers is one of the great
challenges and opportunities of
the network age.”
UN Office for the Coordination of Humanitarian Affairs
“The best minds of my generation
are thinking about how to make
people click ads… That sucks.”
Jeff Hammerbacher, Former Data Manager, Facebook
How can we help?
?
Benefits of competitions
Two-way
Visibility
Community
Building
Accuracy
Matters
Fun
What can non-profits do with data?
Measure Impact!
DATA FOR
ACTION
Collection Plan Data Collection Data Storage Data Analysis Results
DATA FOR IMPACT
data
scientist
domain
expert
data
scientist
domain
expert
There’s more to
data for good than
impact measurement.
What can nonprofits do
with data today?
Education Resource Strategies
Budget
We are
budget-
ing our
things
$
Expenditures
Monies for
making
students
good
Beware
there be
dollars
here
PETRO-VEND FUEL AND FLUIDS
MAINT MATERIALS
SATELLITE COOK
UPPER EARLY INTERVENTION PROGRAM 4-5
Regional Playoff Hosts
Supp.- Materials
ITEMGH EXTENDED DAY
FURNITURE AND FIXTURES
NON-CAPITALIZED AV
Water and Sewage *
Instructional Materials
Food Services - Other Costs
Capital Assets - Locally Defined Groupings
Regular *
TEACHE
R
Special
Instruction
TCHR, SCNDY
MATH
Certificated
Employees
Salaries And
Wages
IN OTH
CERTIFICAT
ED PERSON
1
Disadvantage
d Youth *
$104,928.19
Title I -
Disadvantaged
Children/Target
ed Assistance
BUILDING
ALLOCATION
S
LABEL COLUMN Function Sharing Object_Type Student_Type Position_Type
MOST LIKELY Teacher Compensation School Reported
Base
Salary/Compensatio
n
Poverty Teacher
2ND LIKELY Food Services
School on Central
Budgets
Benefit Unspecified Coordinator/Manager
3RD LIKELY NO_LABEL NO_LABEL Supplies/Materials NO_LABEL NO_LABEL
New Data
Predictions!
Education Resource Strategies
Saving about
300 staff-hours
per year
Data for Action
Use 1: Automation
Data for Action
Use 2: Smarter Strategy
4 years of history
8,000 locations
315,000 violations
• RATINGS
• REVIEWS
• Date of the review
• Free form text
• CATEGORIES
• Cuisine
• Format
• NEGHBORHOODS
• CHECKINS
"The muffins are great...esp
the blueberry! I have
never had that good a
blueberry muffin...its not
super sickey sweet like
most...."
"Food was soggy and cold
by the time I got it and they
messed up my order.
Better food and better
service from other places
nearby."
NEXT NEXT NEXT
Data for Action
Use 3: Better Targeting
DATA FOR
ACTION
Data Analysis Results
> automation
> smarter strategy
> better targeting
What can I do?
www.drivendata.org
drivendata.org/
competitions
CONCEPT 2
CLINIC SLIDES
concepttoclinic.drivendata.org
What else can I do?
1. Join data for good
groups
www.datakind.org
meetup.com/DataScienceforGood/
2. Do data for good in
your spare time
blog.datalook.io/openimpact/
datasf.org/opendata
www.drivendata.org
3. Participate in a
fellowship
dssg.io
dssg-atl.io
escience.washington.edu
www.codeforamerica.org
www.deltanalytics.org
4. Attend data for good
events
www.kdd.org
www.bloomberg.com/company/d4gx
dogooddata.com
5. Get involved
professionally
Get your company involved!
Look for local non-profits!
Donate your skills and your
knowledge in the way that works
for you.
Data for Good Meetup
Domino Data Labs – 30 August 2017
Data has the power to change the world.

More Related Content

Similar to Crowdsourcing Data for Good

Subjects to study if you want to work for a charity
Subjects to study if you want to work for a charitySubjects to study if you want to work for a charity
Subjects to study if you want to work for a charity
AJAL A J
 
Small Business and Community: What They Bring and How We Can Support
Small Business and Community: What They Bring and How We Can SupportSmall Business and Community: What They Bring and How We Can Support
Small Business and Community: What They Bring and How We Can Support
Glenn Muske
 
Online Educa Berlin conference: Big Data in Education - theory and practice
Online Educa Berlin conference: Big Data in Education - theory and practiceOnline Educa Berlin conference: Big Data in Education - theory and practice
Online Educa Berlin conference: Big Data in Education - theory and practice
Mike Moore
 
Bigdata culture landsacpe
Bigdata   culture landsacpeBigdata   culture landsacpe
Bigdata culture landsacpe
barghouthi2016
 
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
The Statistical and Applied Mathematical Sciences Institute
 
Cm lfinal
Cm lfinalCm lfinal
Cm lfinal
Stephen Abram
 
EDM: Finding Answers to Reduce Dropout Rates in Schools
EDM: Finding Answers to Reduce Dropout Rates in SchoolsEDM: Finding Answers to Reduce Dropout Rates in Schools
EDM: Finding Answers to Reduce Dropout Rates in Schools
MangaiK4
 
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
WorkSmart Integrated Marketing
 
Essay On The Importance Of College Education.pdf
Essay On The Importance Of College Education.pdfEssay On The Importance Of College Education.pdf
Essay On The Importance Of College Education.pdf
Janna Smith
 
Storytelling with Data (Global Engagement Summit at Northwestern University 2...
Storytelling with Data (Global Engagement Summit at Northwestern University 2...Storytelling with Data (Global Engagement Summit at Northwestern University 2...
Storytelling with Data (Global Engagement Summit at Northwestern University 2...
Sara Hooker
 
Denver Event - 2013 - Floodlight and Data Engine User Survey
Denver Event - 2013 - Floodlight and Data Engine User SurveyDenver Event - 2013 - Floodlight and Data Engine User Survey
Denver Event - 2013 - Floodlight and Data Engine User Survey
KDMC
 
Recruiting and Retaining Library IT People - What We Learned
Recruiting and Retaining Library IT People - What We LearnedRecruiting and Retaining Library IT People - What We Learned
Recruiting and Retaining Library IT People - What We Learned
William Helman
 
BIG-DATAPPTFINAL.ppt
BIG-DATAPPTFINAL.pptBIG-DATAPPTFINAL.ppt
BIG-DATAPPTFINAL.ppt
rajsharma159890
 
What Is It Going To Cost And What Is In It For Me?
What Is It Going To Cost And What Is In It For Me?What Is It Going To Cost And What Is In It For Me?
What Is It Going To Cost And What Is In It For Me?
Philip Bourne
 
Collecting and using information, chapter 8 class notes
Collecting and using information, chapter 8 class notesCollecting and using information, chapter 8 class notes
Collecting and using information, chapter 8 class notes
varsha nihanth lade
 
Assessment of Future Needs, Costing the Future Needs.pptx
Assessment of Future Needs, Costing the Future Needs.pptxAssessment of Future Needs, Costing the Future Needs.pptx
Assessment of Future Needs, Costing the Future Needs.pptx
DrHafizKosar
 
Cost pitch
Cost pitchCost pitch
Cost pitch
Yuan Gao
 
Changing the Tires While Driving the Car: Leading in Times of Change
Changing the Tires While Driving the Car: Leading in Times of ChangeChanging the Tires While Driving the Car: Leading in Times of Change
Changing the Tires While Driving the Car: Leading in Times of Change
Lisa Colton
 
Influence Of Social Media Marketing Essay
Influence Of Social Media Marketing EssayInfluence Of Social Media Marketing Essay
Influence Of Social Media Marketing Essay
Felicia Barker
 
Harnessing Digital And Social Media To Become A Learning Organization
Harnessing Digital And Social Media To Become A Learning OrganizationHarnessing Digital And Social Media To Become A Learning Organization
Harnessing Digital And Social Media To Become A Learning Organization
Dr. William J. Ward
 

Similar to Crowdsourcing Data for Good (20)

Subjects to study if you want to work for a charity
Subjects to study if you want to work for a charitySubjects to study if you want to work for a charity
Subjects to study if you want to work for a charity
 
Small Business and Community: What They Bring and How We Can Support
Small Business and Community: What They Bring and How We Can SupportSmall Business and Community: What They Bring and How We Can Support
Small Business and Community: What They Bring and How We Can Support
 
Online Educa Berlin conference: Big Data in Education - theory and practice
Online Educa Berlin conference: Big Data in Education - theory and practiceOnline Educa Berlin conference: Big Data in Education - theory and practice
Online Educa Berlin conference: Big Data in Education - theory and practice
 
Bigdata culture landsacpe
Bigdata   culture landsacpeBigdata   culture landsacpe
Bigdata culture landsacpe
 
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
NCCU: The Story of Data Science and Machine Learning Workshop - Data Science ...
 
Cm lfinal
Cm lfinalCm lfinal
Cm lfinal
 
EDM: Finding Answers to Reduce Dropout Rates in Schools
EDM: Finding Answers to Reduce Dropout Rates in SchoolsEDM: Finding Answers to Reduce Dropout Rates in Schools
EDM: Finding Answers to Reduce Dropout Rates in Schools
 
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
Marketing in higher education - Surviving in rough terrain - by Toddy Gibby o...
 
Essay On The Importance Of College Education.pdf
Essay On The Importance Of College Education.pdfEssay On The Importance Of College Education.pdf
Essay On The Importance Of College Education.pdf
 
Storytelling with Data (Global Engagement Summit at Northwestern University 2...
Storytelling with Data (Global Engagement Summit at Northwestern University 2...Storytelling with Data (Global Engagement Summit at Northwestern University 2...
Storytelling with Data (Global Engagement Summit at Northwestern University 2...
 
Denver Event - 2013 - Floodlight and Data Engine User Survey
Denver Event - 2013 - Floodlight and Data Engine User SurveyDenver Event - 2013 - Floodlight and Data Engine User Survey
Denver Event - 2013 - Floodlight and Data Engine User Survey
 
Recruiting and Retaining Library IT People - What We Learned
Recruiting and Retaining Library IT People - What We LearnedRecruiting and Retaining Library IT People - What We Learned
Recruiting and Retaining Library IT People - What We Learned
 
BIG-DATAPPTFINAL.ppt
BIG-DATAPPTFINAL.pptBIG-DATAPPTFINAL.ppt
BIG-DATAPPTFINAL.ppt
 
What Is It Going To Cost And What Is In It For Me?
What Is It Going To Cost And What Is In It For Me?What Is It Going To Cost And What Is In It For Me?
What Is It Going To Cost And What Is In It For Me?
 
Collecting and using information, chapter 8 class notes
Collecting and using information, chapter 8 class notesCollecting and using information, chapter 8 class notes
Collecting and using information, chapter 8 class notes
 
Assessment of Future Needs, Costing the Future Needs.pptx
Assessment of Future Needs, Costing the Future Needs.pptxAssessment of Future Needs, Costing the Future Needs.pptx
Assessment of Future Needs, Costing the Future Needs.pptx
 
Cost pitch
Cost pitchCost pitch
Cost pitch
 
Changing the Tires While Driving the Car: Leading in Times of Change
Changing the Tires While Driving the Car: Leading in Times of ChangeChanging the Tires While Driving the Car: Leading in Times of Change
Changing the Tires While Driving the Car: Leading in Times of Change
 
Influence Of Social Media Marketing Essay
Influence Of Social Media Marketing EssayInfluence Of Social Media Marketing Essay
Influence Of Social Media Marketing Essay
 
Harnessing Digital And Social Media To Become A Learning Organization
Harnessing Digital And Social Media To Become A Learning OrganizationHarnessing Digital And Social Media To Become A Learning Organization
Harnessing Digital And Social Media To Become A Learning Organization
 

Recently uploaded

Bangalore ℂall Girl 000000 Bangalore Escorts Service
Bangalore ℂall Girl 000000 Bangalore Escorts ServiceBangalore ℂall Girl 000000 Bangalore Escorts Service
Bangalore ℂall Girl 000000 Bangalore Escorts Service
nhero3888
 
一比一原版(UofT毕业证)多伦多大学毕业证如何办理
一比一原版(UofT毕业证)多伦多大学毕业证如何办理一比一原版(UofT毕业证)多伦多大学毕业证如何办理
一比一原版(UofT毕业证)多伦多大学毕业证如何办理
exukyp
 
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
Marlon Dumas
 
Q4FY24 Investor-Presentation.pdf bank slide
Q4FY24 Investor-Presentation.pdf bank slideQ4FY24 Investor-Presentation.pdf bank slide
Q4FY24 Investor-Presentation.pdf bank slide
mukulupadhayay1
 
Build applications with generative AI on Google Cloud
Build applications with generative AI on Google CloudBuild applications with generative AI on Google Cloud
Build applications with generative AI on Google Cloud
Márton Kodok
 
Digital Marketing Performance Marketing Sample .pdf
Digital Marketing Performance Marketing  Sample .pdfDigital Marketing Performance Marketing  Sample .pdf
Digital Marketing Performance Marketing Sample .pdf
Vineet
 
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCAModule 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
yuvarajkumar334
 
Overview IFM June 2024 Consumer Confidence INDEX Report.pdf
Overview IFM June 2024 Consumer Confidence INDEX Report.pdfOverview IFM June 2024 Consumer Confidence INDEX Report.pdf
Overview IFM June 2024 Consumer Confidence INDEX Report.pdf
nhutnguyen355078
 
06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus
Timothy Spann
 
一比一原版莱斯大学毕业证(rice毕业证)如何办理
一比一原版莱斯大学毕业证(rice毕业证)如何办理一比一原版莱斯大学毕业证(rice毕业证)如何办理
一比一原版莱斯大学毕业证(rice毕业证)如何办理
zsafxbf
 
一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理
ugydym
 
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
oaxefes
 
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
asyed10
 
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
agdhot
 
How To Control IO Usage using Resource Manager
How To Control IO Usage using Resource ManagerHow To Control IO Usage using Resource Manager
How To Control IO Usage using Resource Manager
Alireza Kamrani
 
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
eudsoh
 
A gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented GenerationA gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented Generation
dataschool1
 
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
Vietnam Cotton & Spinning Association
 
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
Timothy Spann
 
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
z6osjkqvd
 

Recently uploaded (20)

Bangalore ℂall Girl 000000 Bangalore Escorts Service
Bangalore ℂall Girl 000000 Bangalore Escorts ServiceBangalore ℂall Girl 000000 Bangalore Escorts Service
Bangalore ℂall Girl 000000 Bangalore Escorts Service
 
一比一原版(UofT毕业证)多伦多大学毕业证如何办理
一比一原版(UofT毕业证)多伦多大学毕业证如何办理一比一原版(UofT毕业证)多伦多大学毕业证如何办理
一比一原版(UofT毕业证)多伦多大学毕业证如何办理
 
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
Discovering Digital Process Twins for What-if Analysis: a Process Mining Appr...
 
Q4FY24 Investor-Presentation.pdf bank slide
Q4FY24 Investor-Presentation.pdf bank slideQ4FY24 Investor-Presentation.pdf bank slide
Q4FY24 Investor-Presentation.pdf bank slide
 
Build applications with generative AI on Google Cloud
Build applications with generative AI on Google CloudBuild applications with generative AI on Google Cloud
Build applications with generative AI on Google Cloud
 
Digital Marketing Performance Marketing Sample .pdf
Digital Marketing Performance Marketing  Sample .pdfDigital Marketing Performance Marketing  Sample .pdf
Digital Marketing Performance Marketing Sample .pdf
 
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCAModule 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
Module 1 ppt BIG DATA ANALYTICS NOTES FOR MCA
 
Overview IFM June 2024 Consumer Confidence INDEX Report.pdf
Overview IFM June 2024 Consumer Confidence INDEX Report.pdfOverview IFM June 2024 Consumer Confidence INDEX Report.pdf
Overview IFM June 2024 Consumer Confidence INDEX Report.pdf
 
06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus
 
一比一原版莱斯大学毕业证(rice毕业证)如何办理
一比一原版莱斯大学毕业证(rice毕业证)如何办理一比一原版莱斯大学毕业证(rice毕业证)如何办理
一比一原版莱斯大学毕业证(rice毕业证)如何办理
 
一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理
 
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
 
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
一比一原版美国帕森斯设计学院毕业证(parsons毕业证书)如何办理
 
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
一比一原版加拿大麦吉尔大学毕业证(mcgill毕业证书)如何办理
 
How To Control IO Usage using Resource Manager
How To Control IO Usage using Resource ManagerHow To Control IO Usage using Resource Manager
How To Control IO Usage using Resource Manager
 
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
一比一原版马来西亚博特拉大学毕业证(upm毕业证)如何办理
 
A gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented GenerationA gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented Generation
 
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
 
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
 
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
一比一原版英属哥伦比亚大学毕业证(UBC毕业证书)学历如何办理
 

Crowdsourcing Data for Good