That K12 Virtual School you see advertised during episodes of Cheaters and what have you? Well, Andy Berke's got beef:

In his letter, Berke cites information he received from state Education Commissioner Kevin Huffman on the Tennessee Virtual Academy's performance.

Huffman provided Berke with the school's results from the Tennessee Comprehensive Assessment Program achievement tests as well as the Tennessee Value-Added Assessment System.

TVAAS measures growth or gains in student learning by a school system, individual school and by teacher. Both TCAP and TVAAS are key measures in how the state judges public schools' performance.

Virtual Academy students' results on TCAP scores "raise deep concerns over [K12] operations in Tennessee," Berke said, citing a "dismal" 16.4 percent of the school's students scored as proficient or advanced on TCAP's math section.

In reading, the school did better with 39.3 percent of students rated as proficient or advanced.

But Berke said his primary concern are the TVASS measurements of students gains at the online school.

The Tennessee Virtual Academy scored the lowest score -- a 1 -- on the state's five-point assessment, he said, a figure confirmed in a copy of Huffman's letter to the senator.