TenMarks_Amazon_SiteTenMarks, the math instruction company acquired by Amazon last year, released its first app for Amazon’s Kindle platform this morning, and said its summer math program, normally $39/student, will now be available for free.

The release of TenMarks Math for Students for Kindle Fire tablets is a new step by Amazon into the educational market and the first major move by TenMarks since the acquisition was announced last fall.

It’s part of a broader push by the Seattle technology company to beef up its educational lineup and make the Kindle Fire more competitive against the iPad.

The TenMarks app is also available on the Apple tablet and the web. It’s designed for students from First Grade through Algebra 2 and Geometry, helping them retain lessons from the previous year and gear up for the next.

Among the assets that TenMarks brought to Amazon was an existing customer base of more than 25,000 schools in 7,000 districts. TenMarks has traditionally used a freemium model, allowing teachers to sign up for free, but requiring them to pay for certain features.

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