Three Main Movements of Judaism
Introduction
"Approximately 5 million of the world's 13 million Jews live in the United States. There are basically three major movements in the U.S. today: Reform, Conservative and Orthodox. Some people also include a fourth movement, the Reconstructionist movement, although that movement is substantially smaller than the other three. Orthodox and sometimes Conservative are described as "traditional" movements. Reform, Reconstructionist, and sometimes Conservative are described as "liberal" or "modern" movements. " -- as excerpted from "Judaism 101: The Movements of Judaism" by Tracey Rich, located on the home page of Judaism 101

Reform
"[O]ne of the guiding principles of Reform Judaism is the autonomy of the individual. . . . [Jews have thought of themselves as] a people created "in the image of G-d," dedicated to tikkun olam -- the improvement of the world. . . . We Reform Jews are heirs to a vast body of beliefs and practices embodied in TORAH and the other Jewish sacred writings. . . . Reform Judaism accepts and encourages pluralism. . . . All Jews have an obligation to study." -- as excerpted from "What is Reform Judaism?" by Rabbi Simeon J. Maslin, linked by the home page of the Union of American Hebrew Congregations

"The NJPS [1990 National Jewish Population Survey] found that 42% of the Jews in America identify themselves as Reform. There are approximately 900 Reform synagogues in the United States and Canada." -- as excerpted from "Judaism 101: The Movements of Judaism" by Tracey Rich, located on the home page of Judaism 101

Conservative
"There are seven such core values, to my mind, that imprint Conservative Judaism with a principled receptivity to modernity balanced by a deep reverence for tradition. . . . Conceptually they fall into two sets - three national and three religious - which are grounded and joined to each other by the overarching presence of G-d,who represents the seventh and ultimate core value. The dual nature of Judaism as polity and piety, a world religion that never transcended its national origins, is unified by G-d. . . .[The seven values are:]  The Centrality of Modern Israel; Hebrew: The Irreplaceable Language of Jewish Expression; Devotion to the Ideal of Klal Yisrael ['the unfractured totality of Jewish existence and the ultimate significance of every single Jew']; The Defining Role of Torah in the Reshaping of Judaism; The Study of Torah; The Governance of Jewish Life by Halakha [Jewish law]; and Belief in G-d." -- as excerpted from "The Sacred Cluster: The Core Values of Conservative Judaism" by Ismar Schorsch, linked by the home page of the Jewish Theological Seminary

"The NJPS [1990 National Jewish Population Survey] found that 38% of the Jews in America identify themselves as Conservative. There are approximately 750 Conservative synagogues in the world today." -- as excerpted from"Judaism 101: The Movements of Judaism" by Tracey Rich, located on the home page of Judaism 101

Orthodox
"Orthodoxy is actually made up of several different groups. It includes the modern Orthodox, who have largely integrated into modern society while maintaining observance of halakhah (Jewish Law), the Chasidim, who live separately and dress distinctively (commonly, but erroneously, referred to in the media as the "ultra-Orthodox"), and the Yeshivish Orthodox, who are neither Chasidic nor modern. The Orthodox movements are all very similar in belief, and the differences are difficult for anyone who is not Orthodox to understand. They all believe that G-d gave Moses the whole Torah at Mount Sinai. The "whole Torah" includes both the Written Torah (the first five books of the Bible) and the Oral Torah, an oral tradition interpreting and explaining the Written Torah. They believe that the Torah is true, that it has come down to us intact and unchanged. They believe that the Torah contains 613 mitzvot [commandments] binding upon Jews but not upon non-Jews.  The 1990 National Jewish Population Survey (NJPS) performed by the Council of Jewish Federations found that 7% of the Jews in America identify themselves as Orthodox." -- as excerpted from "Judaism 101: The Movements of Judaism" by Tracey Rich, located on the home page of Judaism 101
 

    Thaler, E. M. (Ed.). (2000, July 19). Light Our Candles:  
Judaism - Three Main Movements [WWW document]. Light Our 
Candles. Leavenworth, KS: Saint Mary College. Retrieved 
Month #, 2000 from the World Wide Web: 
https://lightourcandles.tripod.com/judaismmvmt.html