If you're looking for some great math practice problems, Twitter can be one place to turn. It's also convenient since you're probably logging in to tweet on a regular basis anyway. Here are some "Tweeters" to consider if you're looking for some extra practice or a challenge.

**Name: ** NCTM

**Description:** The National Council of Teachers of Mathematics tweets primarily high school level problems. Questions go out in the morning, answers at night.

**Example Problem: ** How many different rectangles can be drawn using the hour marks on a clock's face as vertices?

**Frequency:** Problems tweeted every weekday.

**Name:** Mathprobs

**Description:** Mainly high school level questions are posed. Students posting answers get props via Mathprobs twitter feed or are encouraged to try again.

**Example Problem: **1101011010110 in base 2 = what in base 4???

**Frequency:** About once a week

**Name:** Mathquestions

**Description:** Tweets here are for middle through high school students a little less frequently than some of the others.

**Example Problem: **How can you add eight 8's to get the number 1,000?

**Frequency:** About once a month

**Name: **Tutor4math

**Description:** Provides a link to an SAT question of the day. These questions are a mix of math and verbal.

**Example Problem: ** A train travelling 60 miles per hour for 1 hour covers the same distance as a train traveling 30 miles per hour for how many hours?

**Frequency:** Daily

Name: Algebra_com

**Description:** Tweets links and a short description of questions being posed by students from algebra.com. Requires free registration on algebra.com.

**Example: **A lamp is marked with a sale price of $23.80, which is 15% off the regular price. What is the regular price?

**Frequency:** Multiple times a day

**Name:** ____Math____

**Description:** Posts are questions being posted by students on a math forum. Tends to be middle school to early high school level.

**Example: **How many diagonals does a square have?

**Frequency:** About once a day

Know another great place for math problems on Twitter? Post it in the comments below.

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Lucas Allen is a high school math teacher and math team coach in Illinois. He is interested in just about all forms of technology, including the TI-Nspire, Nexus devices, social media, and more. You can follow Lucas on Google Plus, and if you are nice, he will probably follow you back.

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