| Pacific Tech | en | Mathematics software |
| Packings on spheres | en | Math servers (ftp and gopher) |
| PACT | en | Methodical materials |
| Page "mathematiques" de Vincent Lefevre | fr,en | Texts and documents |
| Pagina de la Sociedad Matematica de Profesores de Cantabria. | sp | Teachers' associations |
| Pagina de la Sociedad Melillense de Educacion Matematica | sp | Teachers' associations |
| Pagina do Professor Nuno Fonseca | pt | Archives of math programs and training math programs |
| Pagina do Professor Nuno Fonseca | pt | Education-related sites |
| Pagina do Professor Nuno Fonseca | pt | Servers with math links (ftp and gopher) |
| Palais de la découverte | fr | Encyclopaedia and musea |
| Paperfolding.com | en | Others mathematics sites |
| Parallel Computing Archive | en | Math servers (ftp and gopher) |
| Parallel Computing Archive | en | Math libraries |
| Paris VI -- Jussieu | en | Math servers (ftp and gopher) |
| Paul's Online Math Tutorial and Notes – Algebra | en | Math problems |
| PBS TeacherSource | en | Guides and educational servers |
| PBS TeacherSource | en | Search engines and links guides |
| PC Novice. [ISSN 1052-1186] Lincoln, NE: Peed Corp | en | Computer magazines |
| PC World. [ISSN 0737-8939] San Francisco, CA: PC World Communications. | en | Computer magazines |
| Pedagoguery Software Inc. | en | Archives of math programs and training math programs |
| Pedagoguery Software Inc. | en | Sites with math tools |
| Pedagoguery Software | en | Mathematics software |
| PedagoJiC | fr | Archives of math programs and training math programs |
| PedagoJiC | fr | Sites with math tools |
| PenguinApps | en | Search engines |
| Pennsylvania Council of Teachers of Mathematics | en | Teacher-oriented sites |
| Pennsylvania Council of Teachers of Mathematics | en | Teachers' associations |
| Personal Algebra Tutor Algebra Problem Solvers | en | Mathematics software |
| Pfz | fr | Sites offering various training techniques |
| Physnum | fr | Mathematical societies |
| Pi Day | en | Numbers, functions, theorems … |
| Pi Mathematics | en | Numbers, functions, theorems … |
| Pierre Simon Laplace | fr | History of mathematics |
| Piguy's Math Page | en | Sites with math tools |
| Pilat informatique йducative | fr | Sites with math tools |
| PILAT | fr | Mathematics software |
| Pitagora e l'antica Kroton | it | History of mathematics |
| PITAGORA EDITRICE: Matematica-Catalogo | it | Guides and educational servers |
| PITAGORA EDITRICE: Matematica-Catalogo | it | Others mathematics sites |
| Pitsco Launch to Resources for Teachers | en | Education-related sites |
| PlaneMath Activities | en | Math solutions |
| Poland | pn | Olympiads, competitions... |
| Poliplus Software | en | Links to math tools |
| Polyedral Solids | en | Numbers, functions, theorems … |
| Polyhedrons | ru | Sites with math tools |
| Polymath Love | en | Mathematics software |
| PolyMod Polyhedron Modeler | en | Mathematics software |
| Polynomial Equations | de | Sites offering various training techniques |
| Ponto Zero | pt | Personal mathematics home pages |
| Popular mathematicians | ru | Numbers, functions, theorems … |
| Popular science. The links to sites and programs | ru | Others links |
| Portal da Matemбtica | pt | Educational portals |
| Portal de Matemбticas | sp | Educational portals |
| Portal Enlaces | sp | General educational sites |
| Portal Prandiano | pt | Educational portals |
| PORTUGALI® MATHEMATICA | pt | Mathematical journals |
| Practical Algebra Lessons | en | Sites with math tests |
| Practical science links | ru | Others links |
| Practice and Test Your Arithmetic | en | Mathematics software |
| Prandiano | pt | Didactics |
| Primary Arithmetic, or Math | en | Methodical materials |
| Primary Learning Centers | en | Education-related sites |
| Prime Exam | en | Sites with math tools |
| Primzahlengeheimnisse | de | History of mathematics |
| Princeton University | en | Math servers (ftp and gopher) |
| Principle extreme | ru | Numbers, functions, theorems … |
| Problem of the Week | en | Math problems |
| Problem of the Week | en | Methodical materials |
| Problem Solving Concepts, Inc. | en | Sites with math tools |
| Problem solving | ru | Others links |
| Problemes mathematiques | fr | Sites with math tests |
| Problems of competitive examinations after mathematician | ru | Methodical materials |
| Problems | ru | Math exams |
| problèmes du championnat international des jeux mathématiques | fr | Sites with math tests |
| Problèmes et jeux mathématiques à l'école primaire | fr | Sites with math tests |
| Profcosinus | fr | Personal mathematics home pages |
| profes.net | sp | General educational sites |
| Professor Freedman's Math Help | en | Sites with math tests |
| Professor Freedman's Math Help | en | Sites offering various training techniques |
| Professor Symancyk's algebra lessons | en | Math courses |
| Progetto Olimpiadi della Matematica | it | Olympiads, competitions... |
| Progetto Rhoda | it | Archives of math programs and training math programs |
| Progiciels interactifs 2000 | fr | Sites with math tools |
| Programmi matematica | it | Archives of math programs and training math programs |
| Project Interactivate | en | Sites offering various training techniques |
| Projet Folium : Histoire des mathematiques | fr | History of mathematics |
| Projetos (Matematica - Mundo da Matematica - Home) | pt | Personal mathematics home pages |
| Promenade mathematique | fr | Methodical materials |
| Proteacher | en | Education-related sites |
| Proyecto Teleducacion - Aula Virtual de Matematica | sp | Sites offering various training techniques |
| Ptolemy's Ptools | en | Sites with math tools |
| Publicaciones Matemáticas | sp | Mathematical journals |
| Publicacions Matematiques | sp | Mathematical journals |
| publications du MAPMO | fr | Texts and documents |
| PUBLIMATH | fr | Didactics |
| PUBLIMATH | fr | Math servers (ftp and gopher) |
| PUC-RIO- Vestibular 2002 - Provas e Gabaritos | pt | Sites with math tools |
| PUC-RIO- Vestibular 2002 - Provas e Gabaritos | pt | Sites with math tools |
| PUMAS - Practical Uses of Math and Science | en | Didactics |
| PUMP Algebra Program | en | Archives of math programs and training math programs |
| Puran2 | de | Sites with math tools |
| Purdue University | en | Math servers (ftp and gopher) |
| Purplemath. Internet links for Algebra | en | Math directories |
| Purplemath | en | Methodical materials |
| Puzzles for the clever people | ru | Logics, paradoxes … |
| Página da Matemática | pt | Archives of math programs and training math programs |
| Página de la Asoc. Mat. Ven. | sp | Mathematical societies |
| Página nueva 2 | sp | Sites offering various training techniques |
| Página Web de José María Arias | sp | Personal mathematics home pages |
| Página web de Miguel de Guzmán Ozámiz | sp | Others mathematics sites |
| Página Web de Ángela Núñez | sp,en | Others mathematics sites |
| PÁGINAS DEL DEPARTAMENTO DE MATEMÁTICAS (I.E.S. "Marqués de Santillana" Colmenar Viejo, Madrid) | sp | Didactics |
| PÁGINAS DEL DEPARTAMENTO DE MATEMÁTICAS (I.E.S. "Marqués de Santillana" Colmenar Viejo, Madrid) | sp | Others mathematics sites |
| Pбgina Web de Josй Marнa Arias | sp | Sites with math tools |