Scratch

Scratch is a is a free program designed to introduce students to programming concepts. Through Scratch students can create animations, games, and videos. Students program in Scratch through a process of dragging and dropping blocks into sequences. Each block represents a command. Student assemble sequences and in turn programs by arranging command blocks. 

When I first used Scratch more than ten years ago when it was only available as a desktop application. Today, you can still do that or you can use Scratch’s online version. ScratchJr, a program based on Scratch, is designed for students under the age of eight to learn programming basics on an iPad, an Android tablet, or on a Chromebook. 

Plenty of tutorials abound for getting started using Scratch. The best place for teachers to start is on the Scratch for Educators site.

GeoGebra

GeoGebra is a free program that math teachers and students can use to build interactive models of problems and concepts.

I am not a math teacher and I have never taught math beyond basic addition and subtraction of fractions therefore I am not an expert on GeoGebra’s capabilities. That said, over the years I have had friends and colleagues who do teach mathematics rave about the capabilities of GeoGebra for modeling functions and graphing equations.

GeoGebra has a huge community of users who share ideas and tutorials for using GeoGebra in a wide variety of settings. You can join that community here. The GeoGebra YouTube channel is probably the best place to find tutorials to help you get started using GeoGebra on your laptop, tablet, or Chromebook.

EduBlogs or Blogger
Edublogs and Blogger have been available for free for as long as I have been blogging. Over the last decade I have used both platforms with students and helped countless teachers get started using both platforms. Edublogs has lasted because it offers fantastic support for teachers. That support comes in the forms of staff members active on Twitter, super responsive email support, and on-going blog posts designed to help teachers engage their students through blogging activities. Blogger’s longevity is due in large part to being owned by Google. Blogger is also very easy to start using. In a manner of minutes you can get your blog up and running.

Even as social media exploded in the forms of Twitter, Facebook, Instagram, Snapchat, and services that came and went quickly (remember Plurk, FriendFeed, and Pownce?) Edublogs and Blogger endured. In all of my workshops and webinars about blogging I say that a blog is your online hub for activity. A blog gives your students a place to fully express their thoughts through words, images, and videos in a manner that can’t be done through social media. A blog also provides you with an easy-to-search archive of the work that you and your students publish. Have you ever tried to find a three month old Tweet or Facebook post? It’s not easy to do. But it is easy to do that on a blog.