A local educational agency, district superintendent of schools, or principal or teacher of any elementary or secondary school, including a charter school, shall not carry on any program for the sole purpose of test preparation of pupils for the statewide pupil assessment system or a particular test used in the statewide pupil assessment system. Nothing in this section prohibits the use of materials to familiarize pupils with item types or the computer-based testing environment used in the California Assessment of Student Performance and Progress.