| # | Flag | Country | Preprimary education, duration (years)Preprimary education, duration (years) | Year |
|---|---|---|---|---|
| 1 | Finland | 4 | 2017 | |
| 2 | Poland | 4 | 2017 | |
| 3 | Mali | 4 | 2017 | |
| 4 | Serbia | 4 | 2017 | |
| 5 | Mongolia | 4 | 2017 | |
| 6 | Kazakhstan | 4 | 2018 | |
| 7 | South Africa | 4 | 2017 | |
| 8 | Russia | 4 | 2017 | |
| 9 | Bulgaria | 4 | 2017 | |
| 10 | Estonia | 4 | 2018 | |
| 11 | Papua New Guinea | 4 | 2017 | |
| 12 | Croatia | 4 | 2017 | |
| 13 | Kyrgyzstan | 4 | 2017 | |
| 14 | Lithuania | 4 | 2018 | |
| 15 | Sweden | 4 | 2017 | |
| 16 | Latvia | 4 | 2018 | |
| 17 | Hungary | 4 | 2017 | |
| 18 | Uzbekistan | 4 | 2017 | |
| 19 | Tajikistan | 4 | 2017 | |
| 20 | Gambia | 4 | 2017 | |
| 21 | Moldova | 4 | 2017 | |
| 22 | Zambia | 4 | 2017 | |
| 23 | Curacao | 2 | 2017 | |
| 24 | United Arab Emirates | 2 | 2017 | |
| 25 | Antigua and Barbuda | 2 | 2017 | |
| 26 | Angola | 2 | 2018 | |
| 27 | Aruba | 2 | 2017 | |
| 28 | Barbados | 2 | 2017 | |
| 29 | Burundi | 2 | 2017 | |
| 30 | Benin | 2 | 2017 | |
| 31 | Bolivia | 2 | 2018 | |
| 32 | Brazil | 2 | 2018 | |
| 33 | The Bahamas | 2 | 2017 | |
| 34 | Bhutan | 2 | 2017 | |
| 35 | Belize | 2 | 2017 | |
| 36 | Switzerland | 2 | 2017 | |
| 37 | Cameroon | 2 | 2017 | |
| 38 | Costa Rica | 2 | 2018 | |
| 39 | Djibouti | 2 | 2018 | |
| 40 | Dominica | 2 | 2017 | |
| 41 | Egypt | 2 | 2017 | |
| 42 | Eritrea | 2 | 2017 | |
| 43 | United Kingdom | 2 | 2017 | |
| 44 | Grenada | 2 | 2017 | |
| 45 | Ghana | 2 | 2018 | |
| 46 | Indonesia | 2 | 2017 | |
| 47 | Iraq | 2 | 2017 | |
| 48 | Jordan | 2 | 2017 | |
| 49 | Saint Kitts And Nevis | 2 | 2017 | |
| 50 | North Korea | 2 | 2018 | |
| 51 | Kuwait | 2 | 2017 | |
| 52 | Cayman Islands | 2 | 2018 | |
| 53 | Saint Lucia | 2 | 2017 | |
| 54 | Liechtenstein | 2 | 2017 | |
| 55 | Libya | 2 | 2017 | |
| 56 | Morocco | 2 | 2017 | |
| 57 | Myanmar | 2 | 2017 | |
| 58 | Malta | 2 | 2017 | |
| 59 | Mauritius | 2 | 2017 | |
| 60 | Malaysia | 2 | 2018 | |
| 61 | Namibia | 2 | 2017 | |
| 62 | Nepal | 2 | 2018 | |
| 63 | New Zealand | 2 | 2018 | |
| 64 | Oman | 2 | 2017 | |
| 65 | Panama | 2 | 2018 | |
| 66 | Pakistan | 2 | 2017 | |
| 67 | Seychelles | 2 | 2017 | |
| 68 | Sudan | 2 | 2017 | |
| 69 | Suriname | 2 | 2018 | |
| 70 | Turks And Caicos Islands | 2 | 2017 | |
| 71 | Tonga | 2 | 2017 | |
| 72 | Trinidad and Tobago | 2 | 2017 | |
| 73 | Tanzania | 2 | 2017 | |
| 74 | Saint Vincent and the Grenadines | 2 | 2017 | |
| 75 | Virgin Islands (British) | 2 | 2017 | |
| 76 | Vanuatu | 2 | 2017 | |
| 77 | Samoa | 2 | 2017 | |
| 78 | Zimbabwe | 2 | 2017 | |
| 79 | Marshall Islands | 2 | 2017 | |
| 80 | Virgin Islands (US) | 1 | 2017 | |
| 81 | Bermuda | 1 | 2017 | |
| 82 | Republic of Ireland | 1 | 2017 | |
| 83 | Guam | 1 | 2017 | |
| 84 | Algeria | 1 | 2017 | |
| 85 | Australia | 1 | 2018 | |
| 86 | Philippines | 1 | 2017 | |
| 87 | Nigeria | 1 | 2017 | |
| 88 | Canada | 1 | 2018 | |
| 89 | Sri Lanka | 1 | 2017 | |
| 90 | Afghanistan | 1 | 2018 | |
| 91 | Iran | 1 | 2017 |