Hi ,

Hope all is well. Summer is right around the corner, and the Khan Academy team is excited to spend the next few months growing our library of content and improving our site before the start of the next school year. With everything on our site being entirely free, we depend on contributions from people like you to make this possible.

$20/month can help us provide 480 hours of free education over the next year.

Make a gift of $20/month

$10/month    $30/month    Other monthly amount    One-time gift

Your monthly support will help us plan for the future and ensure that we have a base of consistent and loyal supporters that we can count on to help us build the best educational experience we can.

Many of our users don’t have the means to make a donation, so if you’ve found value in Khan Academy and are able to pitch in to keep it free and help us grow, please make a small monthly gift today. Your support will go a long way in providing students everywhere with access to a free education in the coming school year and beyond.

Thank you,

Sal Khan
Founder, Khan Academy
For free, for everyone, forever.

 
PO Box 1630, Mountain View, CA 94042 | Our Privacy Policy

If you'd prefer not to receive these types of emails from me, unsubscribe here.

P.S. Khan Academy is a registered 501(c)(3) nonprofit organization, and your donation will be tax-deductible to the fullest extent allowed by law. You’ll also receive the 2015 Patron Badge for donating. Support free education with a monthly gift today!

Give $20/month and provide 480 hours of free education的更多相关文章

  1. INTERVAL YEAR TO MONTH数据类型

    INTERVAL YEAR TO MONTH数据类型 Oracle语法: INTERVAL 'integer [- integer]' {YEAR | MONTH} [(precision)][TO ...

  2. extjs4 分页工具栏pagingtoolbar的每页显示数据combobox下拉框

    var itemsPerPage = 20; var combo; //创建数据源store Ext.define('recordStore', { extend : 'Ext.data.Store' ...

  3. 50+ Useful Docker Tools

    As containers take root, dozens of tools have sprung up to support them. Check out your options for ...

  4. 李宏毅机器学习课程笔记-2.5线性回归Python实战

    本文为作者学习李宏毅机器学习课程时参照样例完成homework1的记录. 任务描述(Task Description) 现在有某地空气质量的观测数据,请使用线性回归拟合数据,预测PM2.5. 数据集描 ...

  5. 李宏毅机器学习笔记——新手感悟——PM2.5作业

    python也不会,计算机也不会,啥都不会,只带了个脑子考了计算机研究生.研究生选了人工智能方向.看来注定是漫长的学习之旅. PM2.5作业,我是一个字都看不懂.所以我采用了直接看答案的方案.把答案看 ...

  6. Monthly Income Report – August 2016

    原文链接:https://marcoschwartz.com/monthly-income-report-august-2016/ Every month, I publish a report of ...

  7. SQL Azure (15) SQL Azure 新的规格

    <Windows Azure Platform 系列文章目录> 在以前的文章中,笔者给大家介绍了Microsoft Azure SQL Database (以前被称为SQL Azure)的 ...

  8. --自动创建备份SQL

    --自动创建备份SQL DECLARE @dbname VARCHAR(50) ,--要备份的数据库名称 @bakname VARCHAR(50) ,--备份后的bat名称 @sql VARCHAR( ...

  9. 从一个复杂的json格式的String内获取某key的值

    如题,如何简单的从一个复杂的String格式内获取某个key的值. 例如:从下面String下取到status的值. {"response":{"info":{ ...

随机推荐

  1. HDU 1358 Period (kmp判断循环子串)

    Period Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submis ...

  2. python命令行中import caffe报错的解决方案

    1.ImportError: No module named skimage.io >>> import caffe Traceback (most recent call last ...

  3. 第7课 Qt中的坐标系统

    1. 坐标系统 (1)GUI操作系统都有特定的坐标系统 (2)图形界面程序在坐标系统中进行窗口和部件的定位 (3)定位类型 ①顶级窗口部件的定位 ②窗口内部件的定位 ③窗口部件的大小设置 (4)QWi ...

  4. Running Your App(运行你的应用程序)

    如果你按照上一篇课程创建了android项目,它将包含helloworld的源文件,让你可以立即运行你的应用程序. 你如何运行你的应用程序app依赖于两件事: 你是否拥有一台真正的android设备 ...

  5. canvas设置repeat

    canvas设置repeat 方法 ctx.createPattern(img, 'repeat'); repeat repeat-x repeat-y no-repeat 重复图片 const ca ...

  6. Shell脚本的特性

    bash shell特性 1.命令补全和文件路径补全, 如果写错无法补全 table 2.命令历史记忆功能history 3.别名功能alias.unalias 4.常用快捷键ctrl+u,k,a,e ...

  7. oreilly 用户故事地图

    这本书是完全买亏了,一点作用也没有. 整篇有用的字很少,还花了我¥16,总结如下: 用户故事模板: 作为用户角色(who),我想要某项功能(what),这样我可以 XXX(原因,why)

  8. 机器学习算法中GBDT和XGBOOST的区别有哪些

    首先xgboost是Gradient Boosting的一种高效系统实现,并不是一种单一算法.xgboost里面的基学习器除了用tree(gbtree),也可用线性分类器(gblinear).而GBD ...

  9. python常用option

    [python常用option] 1. -c cmd : program passed in as string (terminates option list) 解析字符串命令,不读cmd之后的op ...

  10. Excel VBA入门(九)操作工作薄

    虽然我前面讲过,在VBA中操作工作薄并不是件明智的事,但有些时候,还是避免不了要这么做.绝大多数情况下,我们要做的是获取到某个工作薄对象,并以此来获得其中的工作表对象,然后再对工作表中的数据进行处理. ...