AoPS_Number Theory Online Class 2/9

lilijia Post in AoPS_Number_Theory
Comments Off on AoPS_Number Theory Online Class 2/9

Lijia Li is inviting you to a scheduled Zoom meeting.

Topic: AoPS: Number Theory
Time: Feb 9, 2020 12:30 PM Eastern Time (US and Canada)

Join Zoom Meeting
https://us04web.zoom.us/j/4977920611

Meeting ID: 497 792 0611

One tap mobile
+16465588656,,4977920611# US (New York)
+14086380968,,4977920611# US (San Jose)

Dial by your location
+1 646 558 8656 US (New York)
+1 408 638 0968 US (San Jose)
Meeting ID: 497 792 0611
Find your local number: https://us04web.zoom.us/u/fbEYdCPF9e

SAT Math Practice & Online Class 2/9

lilijia Post in SAT math
Comments Off on SAT Math Practice & Online Class 2/9

Dear parents,


In your email please find the practice test for your kids this month. Our next on-site class will be on 3/1/2020. 
Again, welcome to the online class this Sunday afternoon. Please let me know if your kids will attend. 

Topic: SAT Math
Time: Feb 9, 2020 03:30 PM Eastern Time (US and Canada)

Join Zoom Meeting
https://us04web.zoom.us/j/4977920611

Meeting ID: 497 792 0611

One tap mobile
+16465588656,,4977920611# US (New York)
+14086380968,,4977920611# US (San Jose)

Dial by your location
        +1 646 558 8656 US (New York)
        +1 408 638 0968 US (San Jose)
Meeting ID: 497 792 0611
Find your local number: https://us04web.zoom.us/u/fbEYdCPF9e

Best regards,

Lijia

No School 2/9

lilijia Post in AoPS_Number_Theory, SAT math
Comments Off on No School 2/9

接学校通知,2月9日继续停课,改为4月19日补课。欢迎各位家长去学校网站subscribe The NCLS Newsletter,以方便在第一时间收到学校通知。

非常时期,Take care!

https://mailchi.mp/e569cf6da705/ncls-newsletter-recruitment-notice-4745105?e=81d19efa09

2/2 AoPS_Number Theory Brain Stretcher

lilijia Post in AoPS_Number_Theory
Comments Off on 2/2 AoPS_Number Theory Brain Stretcher

Dear students and parents,

Here is the Brain Stretcher worksheet for you to work with this weekend. Some may be new to you, some functions as a review. Please feel free to reach out if you have any questions.

Take care in this special season!


Best,
Lijia

2/2 SAT Math Practice

lilijia Post in SAT math
Comments Off on 2/2 SAT Math Practice

Dear students and parents,

Here is the file of 20 SAT Math Sample questions to practice at home this weekend.

https://collegereadiness.collegeboard.org/pdf/official-sat-study-guide-sample-math-questions-multiple-choice.pdf

Take care in this special season!

Best,

Lijia

AoPS_Number_Theory 2020 Spring Week 1: Integer

lilijia Post in AoPS_Number_Theory
Comments Off on AoPS_Number_Theory 2020 Spring Week 1: Integer

AoPS_Number_Theory 2020 Spring Week 1:  Linear Models

Welcome to the new course of AoPS: Intro to Number Theory! Here is the course information and teaching schedule: http://blog.newtonchineseschool.org/lilijia/number-theory/

Welcome new friend Alex!

Lesson Review:

  • We did a pretest and went through all the problems in class. Make sure you get the basic skills for this class (especially: finding divisors and remainders, exponents, solving quadratic equations)
  • Integers, natural numbers, whole numbers, counting numbers
  • Perfect square/cube/power
  • Remainder
  • n/0 is undefined
  • a proper divisor of an integer n is a positive divisor of n other than n.
  • We commonly write n|k. This means that n is a divisor of k. (n is the divisor, and k is the dividend)
  • If a|b and b|c, then a|c, i.e. divisibility is a transitive relation.

Homework:

  • Page 6: Ex 1.2.3
  • Page 10: Ex 1.3.5, 1.3.9
  • Page 14: Ex 1.4.1
  • Page 18: Ex 1.5.1 (j) (i)
  • Page 19: Ex 1.6.1, 1.6.2
  • Page 24: Ex 1.17, 1.18 (*1.19 bonus)

Other Resources:

No school next Sunday. Happy Lunar New Year! See you on 2/2 (We will learn Chapter 2: primes and composites).

Please join in the Wechat Group:

SAT-Math 2020 Spring Week 1: Linear Models

lilijia Post in SAT math
Comments Off on SAT-Math 2020 Spring Week 1: Linear Models

SAT-Math 2020 Spring Week 1:  Linear Models

Welcome new friend Abby!

This is the first class in the Spring Semester. By the end of June, we will go through all the topics including linear/quadratics, number theory foundation (synthetic division, complex numbers, absolute value), geometry (angles, triangles, circles, and volumes), trigonometry, probability, statistics, and reading data.

Lesson Review:

1. Comments & corrections on 2019 Fall Final Term

  • When the coefficients of each term are equal, we can say the left and right parts of an equation are equal. (Section 3, Q10, and Section 4, Q16)
  • The root square should be non-negative (Section 3, Q15)
  • Read every keyword carefully. Know which data you should look into. (Section 4, Q9)
  • Pythagorean Triples (3,4,5), (5,12,13), (7,24,25) and so on.
Use this scoring table to find how much you can get in this practice test:)

2. Chapter 14: Interpreting Linear Models

  • Understanding the meanings/applications of “slope” (rate of change) and ”y-intercept” (the value of the function when x=0).

Homework:

1. Corrections of Final Exam Paper

2. Chapter 14 Exercise (Page 113-116)

Other Resources:

https://www.khanacademy.org/test-prep/praxis-math/praxis-math-lessons/gtp–praxis-math–lessons–statistics-and-probability/a/gtp–praxis-math–article–interpreting-linear-models–lesson

No school next Sunday. Happy Lunar New Year! See you on 2/2!

SAT-Math Week 15: Final Exam

lilijia Post in SAT math
Comments Off on SAT-Math Week 15: Final Exam

今天的考试Section 4在复印试题的时候发生“意外”,打印机误将2张纸一起卷进去,导致中间2面的试题没有复印,这样全班人20-25题都没有做,直到李老师批改试卷的时候才发觉!所以下周日上课会抽出5分钟时间给大家补做这5题!抱歉发生这样的乌龙~~

试卷都已经批好,错题也已经录入我的小数据库。这次期末比期中考试难了一些,我们会在下周挑选典型错题重点讲解。

下周会开始新的一章,Chapter 14: Interpreting Linear Models. 请大家记得带上课本与试卷。

另外,我们把Teaching Schedule做了微调,原定3.15的期中考试推迟到3月29日。这样保证前后半个学期的课时数相对均衡。具体详见:

我们下周见!(还未注册春季学期课程的家长请勿错过1月19日的报名缴费日期^_^)

AoPS_CP Week 15: Final Exam

lilijia Post in AOPS_Counting_Probability
Comments Off on AoPS_CP Week 15: Final Exam

Answer Key:

今天的期末考试有些难(AoPS系列课程属于相对Advanced level,加上这门课与下周即将开始的Number Theory一样,许多知识点在日常课程教学大纲之外,属于数学竞赛内容),所以孩子们的分数若不理想,不要太灰心。更重要的是做好订正(正如我要求学生日常做好每次作业的订正一样道理),查漏补缺。

学习数学最主要的是锻炼数学思维,激发钻研的兴趣,以及和诸多其他项目学习一样: 培养孩子们迎难而上的韧劲与永不言败的毅力。 一纸分数是眼前的,一颗种子是一辈子的^_^

再次感谢所有孩子与家长这一学期来的努力!愿大家收获一颗热爱探索的种子,在合适的时机与适宜的土壤,发芽、长叶、开花!

我们新学期见!

Reminder: Final Exam + Spring Course

lilijia Post in AOPS_Counting_Probability
Comments Off on Reminder: Final Exam + Spring Course

Dear all,

Please bring a calculator to school this Sunday for the final exam.

1/18 will be the first day of the Spring Semester. We have finished AoPS: Counting & Probability in fall, and will have AoPS: Number theory in the Spring.

Course Description: http://www.newtonchineseschool.org/news/AOPSNumbertheoryCourseDescription.pdf

Textbook: AOPS – Introduction to Number Theory, by Mathew Crawford
Purchase online: https://artofproblemsolving.com/store/item/intro-number-theory

Best,
Lijia