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Home
Courses
English Class
SuperKids
Language Arts K-G2
Phonics Fundation
Phonics Program Level 1
Phonics Program Level 2
Phonics Program Level 3
Phonics Program Level 4
Phonics Program Level 5
Wonders K-G6
Wordly Wise 3000
Grammar
Reading Club
Reading Explorer
Harry Potter Collection
Story of the World
Write Source
Write Source G1
Write Source G2
Write Source G3
Write Source G4
Write Source G5
Write Source G6
Write Source G7
Write Source G8
Creative Writing
Aspiring Writer’s Club
Math Class
Singapore Math
Beast Academy
Math Competition
AOPS Series courses
History
Story of the World
Science
General Science G2-3
Science Series G5-7
Generation Genius
Genius Science STEM K-2 Program
Genius Science STEM G2-G7 Program
Coding/Programming
Scratch Programming
Python Programming
Java Emerald
Chess Class
Chinese Class
中文基础课-部编中文
拼音、识字专项课程
华裔儿童语音启蒙/演讲主持课
Chinsese AP Prep
Spanish Class
French Class
Programs
Science Lab (Elementary & Middle School)
Lego Robotics Program
Vex Robotics Program (IQ & VRC)
FLL Challenge Tournament Prep
Public Speaking/Debate Program
Gifted and Talented Program
Gifted and Talented Prep Kindergarten Program
Gifted and Talented Prep G1 Program
Gifted and Talented Prep G2 Program
Gifted and Talented Prep G3 Program
Gifted and Talented Prep G4 Program
Gifted and Talented Prep G5 Program
Spelling Bee Prep Program
The New York Times Writing Contests
Scholastic Writing Competition Prep Program
Scholastic Writing Competition Program
Emotional Intelligence Program
SAT/ACT Test Prep Program
Positive Parenting Program
Pre-K Homeschool Program
After School Enrich & Diagnosis Program
Writing Revise Membership Program
Camps
Summer Onsite Camp 2023
Summer Online Camp 2023
Reading Camp
Writing Boot Camp
Theme Writing Camp
Public Speaking & Debate Camp
Emotional Intelligence Camp
Spanish camp
Christmas Camps
Community
Ustar学员家长好评
回馈家长好评分享活动
学生精彩视频回顾
Ustar招募班主任！
如何推荐朋友获取折扣码
如何在Ustar注册和购买课程
如何查找和观看Ustar课程录像
如何使用Ustar论坛和课程组提交作业
Ustar Education
LEARNING TO SUCCEED
Bookstore
Teachers
Become Teacher
About Ustar
Account
Login
Register
My booking
Refer A Friend
Affiliate Dashboard
Science G1 Lesson 4
SCIENCE G1 LESSON 4
LESSON 4
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