CS50x - Lecture 0 - Scratch
★
★
★
★
★
5/5
Tuit catalog
Synthesis notes of video analyses, assessed and condensed, in French and English.
54,190 tuit
·
964 channels
·
42 domains
·
Last update: Nov 1, 2026
Agriculture & Food
169
AI — Models & Research
4487
AI — News & Applications
2155
AI & Society
1188
Archaeology
140
Arts & Architecture
1464
Astronomy & Cosmology
3697
Biology
2194
Chemistry
346
Climate & Ecology
1075
Computing & Cybersecurity
4340
Control & Robotics
385
Earth Sciences & Geography
303
Economics & Finance
3841
Education
778
Energy
1538
Engineering & Technology
3396
Foresight & Science Fiction
345
Geopolitics & Defence
582
History
771
Hobbies & Practical
428
Language & Linguistics
320
Law & Justice
585
Literature & Writing
966
Mathematics
2336
Media & Information
304
Medicine & Health
3168
Neuroscience
442
Paleontology
99
Personal Development
1092
Philosophy & Ethics
874
Physics
3533
Politics & Institutions
721
Psychology
643
Religion & Beliefs
255
Science — General & History
1853
Society & Culture
1153
Space Exploration
925
Sports
90
Transport & Mobility
191
Urban Planning & Mobility
96
Video Games
922
JMP
Abnormal psychology
20
VSC
Advice on careers and achieving success
124
TRP
Aerospace and aviation technology
903
PBF
Algebra
264
PBMW
Algebraic geometry
156
PBPD
Algebraic topology
77
UMB
Algorithms and data structures
78
KNBT
Alternative and renewable energy industries
135
THV
Alternative and renewable energy sources and technology
179
MKJD
Alzheimer’s, dementia, Parkinson’s disease and other neurodegenerative diseases
68
QDHA
Ancient Greek and Roman philosophy
52
NHC
Ancient history
35
JBFU
Animals and society
24
PBW
Applied mathematics
20
TTB
Applied optics
45
NKDS
Archaeological sites
34
NK
Archaeology
43
NKD
Archaeology by period
30
AM
Architecture
34
UYQD
Artificial general intelligence (AGI)
51
UYQ
Artificial intelligence (AI)
2154
LNQH
Artificial intelligence law and regulations
22
VSPM
Assertiveness, motivation, self-esteem and positive mental attitude
430
TTDS
Astronautics
992
PGG
Astronomical observation: observatories, equipment and methods
114
PG
Astronomy, space and time
918
PHVB
Astrophysics
122
PHM
Atomic and molecular physics
74
MKJA
Autism Spectrum Disorder
20
TJFM
Automatic control engineering
71
TRC
Automotive technology and trades
28
TRPS
Aviation skills and piloting
22
KFFK
Banking
23
THYB
Battery technology
195
PBTB
Bayesian inference
31
PSB
Biochemistry
312
RNCB
Biodiversity
35
PSAD
Bioethics
39
DNBH
Biography: historical, political and military
83
DNBM
Biography: philosophy and social sciences
20
DNBR
Biography: royalty
26
DNBT
Biography: science, technology and medicine
82
DNBL
Biography: writers
40
PS
Biology, life sciences
30
MQW
Biomedical engineering
24
PHVN
Biophysics
29
TCB
Biotechnology
63
TNK
Building construction and materials
33
TNKE
Building physics and energy-efficient construction
20
KJ
Business and Management
54
KJJ
Business and the environment; sustainable approaches to business
43
KJG
Business ethics and social responsibility
20
KJD
Business innovation
40
KJC
Business strategy
47
PBKA
Calculus
43
PBK
Calculus and mathematical analysis
64
MJD
Cardiovascular medicine
36
JNR
Careers guidance
37
PSAN1
Cellular and molecular neuroscience
23
PSF
Cellular biology (cytology)
133
JPQB
Central
59
PN
Chemistry
27
MJCL2
Chemotherapy
26
JMC
Child, developmental and lifespan psychology
30
AMVD
City and town planning: architectural aspects
32
NHWR3
Civil wars
22
PHD
Classical mechanics
196
RNPG
Climate change
227
RBPC
Climatology and climate modelling
38
MBGR1
Clinical trials
24
UTC
Cloud computing
30
GPJ
Coding theory and cryptology
42
JMR
Cognition and cognitive psychology
136
PSAN5
Cognitive and behavioural neuroscience
246
GTK
Cognitive studies
40
NHTW
Cold wars and proxy conflicts
20
PBV
Combinatorics and graph theory
54
GTC
Communication studies
35
TJK
Communications engineering
41
DSM
Comparative literature
23
LNCH
Competition law
29
PBKD
Complex analysis, complex variables
60
PSAX
Computational biology
101
KNTV
Computer and video game industry
219
UYF
Computer architecture and logic design
123
URH
Computer fraud and hacking
280
UDX
Computer games
640
UGG
Computer games design
239
UK
Computer hardware
74
UYM
Computer modelling and simulation
23
UT
Computer networking and communications
26
UY
Computer science
69
UR
Computer security
753
URJ
Computer viruses, Trojans and worms
30
UYQV
Computer vision
119
PHFC
Condensed matter physics (liquid state and solid state physics)
136
RNKH
Conservation of wildlife and habitats
32
JBGX
Conspiracy theories
53
LNDX
Constitution
32
VFJB3
Coping with
20
KFFH
Corporate finance
22
JPZ
Corruption in politics, government and society
32
PGK
Cosmology and the universe
1045
CBV
Creative writing and creative writing guides
21
JKVF
Criminal investigation and detection
41
GPH
Data science and analysis
39
GTS
Decolonisation of knowledge
48
KCM
Development economics and emerging economies
66
GTP
Development studies
42
PSC
Developmental biology
40
MBNH3
Dietetics and nutrition
27
PBMP
Differential and Riemannian geometry
40
PBKJ
Differential calculus and equations
95
UBJ
Digital and information technologies: social and ethical aspects
1182
UB
Digital and Information technology: general topics
56
UXA
Digital Humanities
50
UD
Digital Lifestyle and online world: consumer and user guides
24
KCVM
Digital or internet economics
56
WNA
Dinosaurs and the prehistoric world: general interest
72
JPSD
Diplomacy
36
JBFM
Disability: social aspects
27
JBCT5
Disinformation and misinformation
76
KJDD
Disruptive innovation
23
ATFR
Documentary films
23
RNFD
Drought and water supply
26
PHDT
Dynamics and statics
81
QDHC
East Asian and Indian philosophy
29
PSAF
Ecological science, the Biosphere
50
KCX
Economic and financial crises and disasters
37
KCA
Economic theory and philosophy
35
KC
Economics
21
JN
Education
28
JNDH
Education: examinations and assessment
31
JNK
Educational administration and organization
21
JNV
Educational equipment and technology, computer-aided learning (CAL)
76
JNC
Educational psychology
28
JNF
Educational strategies and policy
29
JPHF
Elections and referenda
46
TRV
Electric vehicles
73
THR
Electrical engineering
70
KNBL
Electrical power generation and distribution industries
276
PHK
Electricity, electromagnetism and magnetism
278
TJFD
Electronic devices and materials
248
TJFC
Electronics: circuits and components
188
PHDB
Elementary mechanics
37
VSPQ
Emotions and emotional intelligence
25
MJG
Endocrinology
24
PHDY
Energy
26
LNCR
Energy and natural resources law
39
THYC
Energy efficiency
66
KNB
Energy industries and utilities
223
RNFY
Energy resources
55
THY
Energy, power generation, distribution and storage
385
TGMB
Engineering thermodynamics
25
TBC
Engineering: general
22
TGMF
Engineering: Mechanics of fluids
23
TGMD
Engineering: Mechanics of solids
24
UFL
Enterprise software
57
KJH
Entrepreneurship
175
KCVG
Environmental economics
108
MBNH2
Environmental factors
51
RND
Environmental policy and protocols
204
RNA
Environmentalist thought and ideology
80
MBNS
Epidemiology and Medical statistics
126
SXE
eSports
24
QDTQ
Ethics and moral philosophy
52
PSVP
Ethology and animal behaviour
38
PBMH
Euclidean geometry
44
NHD
European history
27
PSAJ
Evolution
176
PSXE
Evolutionary anthropology
92
UYQE
Expert systems
27
JPFQ
Far-right political ideologies and movements
20
ATFG
Film guides and reviews
107
ATFA
Film history, theory or criticism
45
ATFN
Film: styles and genres
342
KFF
Finance and the finance industry
36
KFFF
Financial technology (fintech)
36
RNFF
Food security and supply
37
PBKF
Functional analysis and transforms
29
PGM
Galaxies and stars
341
UMK
Games development and programming
44
JBSF
Gender studies, gender groups
27
JBSF1
Gender studies: women and girls
100
MKZV
Gene therapy
40
GTZ
General studies and General knowledge
35
UYQF
Generative artificial intelligence
2491
TCBG
Genetic engineering
50
PSAK
Genetics (non-medical)
652
RBG
Geology, geomorphology and the lithosphere
28
PBM
Geometry
22
PHVG
Geophysics
39
JPSL
Geopolitics
320
THVG
Geothermal energy and power
37
PHDV
Gravity
34
KFFS
Green finance
58
PBG
Groups and group theory
105
MJF
Haematology
20
MBP
Health systems and services
37
JBFN
Health, illness or addiction: social aspects
24
VFMD
Health: Diets and nutrition
23
TNKH
Heating, lighting, ventilation
23
MJJ
Hepatology
40
JNM
Higher education, tertiary education
241
RBGF
Historical geology and palaeogeology
51
NHAH
Historiography
34
NH
History
41
AGA
History of art
40
UBB
History of Computing, digital and information technologies
51
TBX
History of engineering and technology
29
JBCC9
History of ideas
20
PBX
History of mathematics
39
NHQ
History of other geographical groupings and regions or specific cultures
27
PDX
History of science
160
KJZ
History of specific companies
36
NHK
History of the Americas
56
NHT
History: specific events and topics
27
JBFD
Housing and homelessness
21
PSX
Human biology
27
JPVH
Human rights, civil rights
42
THD
Hydrogen technologies
63
THVH
Hydropower
25
TTBM
Imaging systems and technology
26
MJCM
Immunology
101
PDR
Impact of science and technology on society
126
AMB
Individual architects and architectural firms
32
AGB
Individual artists, art monographs
35
ATFB
Individual film directors, film-makers
30
PDG
Industrial applications of scientific research and technological innovation
54
MJCJ
Infectious and contagious diseases
55
KNTX
Information technology industries
363
JWD
Information warfare
32
PSVA2
Insects (entomology)
22
GTV
Institutions and learned societies: general
34
PBKL
Integral calculus and equations
26
GT
Interdisciplinary studies
22
KCL
International economics
20
JPSN
International institutions
26
JPS
International relations
25
KCLT
International trade and commerce
55
ATN
Internet and digital media: arts and performance
52
UDB
Internet guides and online services
21
UBW
Internet: general works
41
JMHC
Interpersonal communication and skills
28
DNPB
Interviews
45
KFFM
Investment and securities
142
KJMV3
IT and information systems management
41
VSCB
Job hunting
27
KCF
Labour
95
PHJL
Laser physics
50
TTBL
Laser technology and holography
22
PSA
Life sciences: general issues
22
ULJL
Linux
21
DSRC
Literary companions, book reviews and guides
35
DSBB
Literary studies: ancient, classical and medieval
23
DSK
Literary studies: fiction, novelists and prose writers
77
DSB
Literary studies: general
25
DSC
Literary studies: poetry and poets
50
DSA
Literary theory
30
UYQM
Machine learning
1178
KCB
Macroeconomics
23
KJMB
Management: leadership and motivation
67
PSPM
Marine biology
24
NHTM
Maritime history
34
TGM
Materials science
54
MKCM
Materno-foetal medicine
41
PHU
Mathematical
168
PBCD
Mathematical logic
114
PBWH
Mathematical modelling
53
UYA
Mathematical theory of computation
256
PB
Mathematics
169
MFKH3
Maturation and ageing
74
JBCT
Media studies
26
JBCT1
Media studies: internet, digital media and society
70
JBCT4
Media studies: journalism
90
MBPM
Medical administration and management
23
MBF
Medical and health informatics
65
MFN
Medical genetics
177
MKS
Medical imaging
21
MBGL
Medical laboratory testing and techniques
21
PHVD
Medical physics
20
MBGR
Medical research
60
MB
Medicine
23
RBPM
Meteorology
37
PSG
Microbiology (non-medical)
64
JBFH
Migration, immigration and emigration
32
JWK
Military and defence strategy
45
NHWR9
Military history: post-WW2 conflicts
20
TTU
Mining technology and engineering
20
UMS
Mobile and handheld device programming
24
TJKT1
Mobile phone technology
22
UDT
Mobile phones and smartphones: consumer
53
PSD
Molecular biology
185
KCBM
Monetary economics
80
JNAM
Moral and social purpose of education
23
GLZ
Museology and heritage studies
54
TBN
Nanotechnology
34
UYX
Natural computing
900
RNR
Natural disasters
27
UYQL
Natural language and machine translation
156
WN
Nature and the natural world: general interest
47
UTN
Network security
63
UTP
Networking standards and protocols
27
UYQN
Neural networks and fuzzy systems
454
MKJ
Neurology and clinical neurophysiology
58
PSAN
Neurosciences
125
KNTP2
News media and journalism
24
PNRL
Nuclear chemistry, photochemistry and radiation
27
RNQ
Nuclear issues
30
MKR
Nuclear medicine
66
PHN
Nuclear physics
113
THK
Nuclear power and engineering
212
PBH
Number theory
191
PBKS
Numerical analysis
41
MQC
Nursing
24
MQCA
Nursing fundamentals and skills
39
RBKC
Oceanography (seas and oceans)
57
MJCL
Oncology
131
KJSG
Online marketing
32
MJQ
Ophthalmology
20
PHJ
Optical physics
178
PBU
Optimization
33
TTMW
Ordnance, weapons technology
21
PNN
Organic chemistry
66
RBX
Palaeontology
99
MKB
Palliative medicine
36
UYFP
Parallel processing
27
PHP
Particle and high-energy physics
140
GTU
Peace studies and conflict resolution
41
MBNH
Personal and public health
22
UKP
Personal computers
21
VSB
Personal finance
53
UDA
Personal organization software and apps
20
KJMV2
Personnel and human resources management
39
KNBP
Petroleum, oil and gas industries
95
MKG
Pharmacology
71
QD
Philosophy
47
JNA
Philosophy and theory of education
39
PBB
Philosophy of mathematics
33
QDTM
Philosophy of mind
82
PDA
Philosophy of science
154
QDTK
Philosophy: epistemology and theory of knowledge
128
QDTL
Philosophy: logic
47
QDTJ
Philosophy: metaphysics and ontology
42
PNR
Physical chemistry
70
PH
Physics
196
PHDF
Physics: Fluid mechanics
53
JMM
Physiological psychology, neuropsychology, biopsychology
26
MFG
Physiology
53
PSTB
Plant biology
31
PHFP
Plasma physics
34
KCP
Political economy
123
WHB
Political humour
21
JPHL
Political leaders and leadership
44
JPA
Political science and theory
32
JPH
Political structure and processes
23
JPHV
Political structures
45
JP
Politics and government
67
RNP
Pollution and threats to the environment
41
PDZM
Popular and recreational mathematics
115
WNX
Popular astronomy and space
809
VFD
Popular medicine and health
24
QDX
Popular philosophy
20
QDXB
Popular philosophy: Meaning of life
30
VSP
Popular psychology
250
PDZ
Popular science
447
JBFC
Poverty and precarity
21
JPWG
Pressure groups, protest movements and non-violent action
34
URD
Privacy and data protection
38
PBT
Probability and statistics
254
TDCX
Process engineering technology and techniques
21
TGP
Production and industrial engineering
45
UMX
Programming and scripting languages: general
113
UMA
Programming techniques
38
JMAF
Psychoanalytical and Freudian psychology
23
JMA
Psychological theory, systems, schools and viewpoints
26
JM
Psychology
71
JMQ
Psychology: emotions
27
JMT
Psychology: states of consciousness
36
JMS
Psychology: the self, ego, identity, personality
28
MKGW
Psychopharmacology
39
JPP
Public administration
38
KFFD
Public finance and taxation
47
MBN
Public health and preventive medicine
76
GPSD
Quantitative research methods
20
PHQ
Quantum physics (quantum mechanics and quantum field theory)
977
JBFA1
Racism and racial discrimination
31
PBKB
Real analysis, real variables
42
MFGG
Regional physiology
25
PHR
Relativity physics
343
QRAM2
Religion and politics
23
QRAM3
Religion and science
27
DNP
Reportage, journalism or collected columns
74
GPS
Research methods
101
RNKH2
Restoration ecology
21
NHTV
Revolutions, uprisings, rebellions
24
TJFM1
Robotics
314
KJS
Sales and marketing
48
KJMV7
Sales and marketing management
44
UFLS
SAP (Systems, applications and products in databases)
24
FLU
Science fiction: aliens
77
FLW
Science fiction: space exploration
200
FLS
Science fiction: space opera
35
PDK
Science funding and policy
70
PD
Science: general issues
64
PDM
Scientific research
60
WNCS1
Sea life and the seashore: general interest
23
NHWR7
Second World War
58
VS
Self-help, personal development and practical advice
32
CFG
Semantics, discourse analysis, stylistics
33
GTD
Semiotics
64
PSAN4
Sensory and motor systems
23
PBCH
Set theory
20
TJKH
Signal processing
35
NHTS
Slavery, enslaved persons and abolition of slavery
28
JHMC
Social and cultural anthropology
22
NHTB
Social and cultural history
78
JBF
Social and ethical issues
34
QDTS
Social and political philosophy
83
JBFX
Social attitudes
21
JBFZ
Social forecasting, future studies
37
RNT
Social impact of environmental issues
46
JMH
Social, group or collective psychology
80
CFB
Sociolinguistics
38
VSS
Soft skills and dealing with other people
21
UMZ
Software Engineering
81
UMZT
Software testing and verification
31
THVS
Solar power
216
PGS
Solar system: the Sun and planets
335
TTDX
Space exploration
546
TTD
Space science
278
CBP
Speaking in public: advice and guides
24
DNS
Speeches
45
PHS
Statistical physics
56
PBWL
Stochastics
44
RNU
Sustainability
61
TVF
Sustainable agriculture
25
JNU
Teaching of a specific subject
30
TB
Technology: general issues
20
ATJ
Television
41
ATJS
Television: styles and genres
20
ATD
Theatre studies
26
PGC
Theoretical and mathematical astronomy
76
AMA
Theory of architecture
25
ABA
Theory of art
51
AVA
Theory of music and musicology
24
PHH
Thermodynamics and heat
35
PGZ
Time (chronology), time systems and standards
47
PBP
Topology
41
RPT
Transport planning and policy
22
RPC
Urban and municipal planning and policy
66
UYZG
User interface design and usability
21
MBNK
Vaccination
31
RBC
Volcanology and seismology
38
RNH
Waste management
21
PHDS
Wave mechanics (vibration and acoustics)
43
UGB
Web graphics and design
24
UMW
Web programming
82
WNCF
Wildlife: mammals: general interest
29
THVW
Wind power
30
CBW
Writing and editing guides
28
PSV
Zoology and animal sciences
22
China's Shocking New AI Robot Able To Harm Humans
★
★
☆
☆
☆
2/5
China dominará la IA en 2026 (nuestras predicciones en IA para 2026)
China will dominate AI in 2026 (our AI predictions for 2026)
★
★
★
☆
☆
3/5
Ces particules invisibles pourraient changer notre vision de l’univers
These invisible particles could change our view of the universe
★
★
★
★
☆
4/5
ANACONDA, 1er film de 2026 et je pète déjà un cable | Critique sans spoilers + film bonus !
ANACONDA, the first film of 2026 and I'm already freaking out | Spoiler-free review + bonus film!
★
★
★
★
☆
4/5
Alexander Graham Bell Documentary to Fall Asleep To
★
★
★
★
☆
4/5
AI New Year's: The 10 Week AI Resolution
★
★
★
★
☆
4/5
5 Sci-Fi Fantasies That Could Soon Become Reality
★
★
★
★
☆
4/5
20(25) Games You Should Have Played
★
★
★
★
☆
4/5
When We Were Apollo | Free Documentary Space
★
★
★
★
☆
4/5
Visualización avanzada de proteínas y complejos moleculares
Advanced visualization of proteins and molecular complexes
★
★
★
★
☆
4/5
Top Science Advances of 2025 - Roundup Stream
★
★
★
★
☆
4/5
The Closest Thing We Have to Alien Technology
★
★
★
★
★
5/5
Rayons X sur 3I/ATLAS : Ce qu'on a découvert est sans précédent
X-rays on 3I/ATLAS: What we discovered is unprecedented
★
★
★
★
☆
4/5
Quantum Entanglement Theory, Explained Slowly
★
★
★
★
☆
4/5
Quand les dinosaures ont DISPARU… quelque chose de pire est apparu Documentaire Histoire de la Terre
When the dinosaurs DISAPPEARED… something worse appeared Earth History Documentary
★
★
★
★
☆
4/5
Lune, militaire, civil : Xavier Pasco fait le point sur la nouvelle ère spatiale.
The Moon, military, and civilian: Xavier Pasco takes stock of the new space age.
★
★
★
★
☆
4/5
La PREUVE que la Vitesse de la Lumière est INFRANCHISSABLE
PROOF that the Speed of Light is UNBREAKABLE
★
★
★
★
☆
4/5
High dimensional statistics - session 23
★
★
★
★
☆
4/5
Golden Section (φ² = φ + 1)
★
★
★
★
☆
4/5
Faut-il ABSOLUMENT une TOILE pour son VIDÉOPROJECTEUR ?
Do you ABSOLUTELY need a SCREEN for your VIDEO PROJECTOR?
★
★
★
★
☆
4/5
Chuck Nice: Just Smart Enough | Full Comedy Special
★
★
★
★
☆
4/5
Ce logiciel devrait être payant (tellement c'est un bijou)
This software should be paid (it's such a gem)
★
★
★
★
☆
4/5
![AutoGrad Changed Everything (Not Transformers) [Dr. Jeff Beck]](https://i.ytimg.com/vi/9suqiofCiwM/maxresdefault.jpg)
2026 será la nueva edad de oro para los programadores
2026 will be the new golden age for programmers
★
★
★
★
☆
4/5